Mopar 340 j heads. And yall can continue the conversation from 1973s thread.
● Mopar 340 j heads $3,950. Chrysler went with the 1. In 71 only the 360 got the 915 head (small valve). 1970 340 J I run 2. Please Contact. as my 340 stock have. Has stock manifolds, 2. I also wouldn't base my opinion on what a single guy said. Apparel. According to Carroll Shelby's Speed Secrets (Mopar Engine) the head with casting #3418915 was used on the 70 340 6 barrell T/A, 71 360 and 72 340/360. Filters. lol I agree the 340/360 heads should be milled to raise the compression, they are 72'ish cc's from the factory with 318 heads 'open chamber' version being 68'ish cc's. Vintage MOPAR chat: 6: 10-30-2008 03:42 PM: 906 casting heads from a 70 440 HP: spdge70: Rear Wheel Drive - Parts for Sale: 1: 11-17-2007 08:12 PM: 302 casting I have a 1973 340 4 speed Duster that has a # matching engine and transmission. Was also told that theses were the replacement heads you could order from Ma Mopar? #6 03 I talked to Scott Koffel abought fully porting my J heads for the 340 to 416 stroker assembly I'm mulling over having them do. 30 over, Speed Pro Forged pistons- L2316F, J heads, Crane Cam 150062- Flat tappet (Crane Cams 150062 Crane Hydraulic Flat Tappet Camshafts | Summit Racing) and some bottom end work done- to what extent not sure. Never been apart. 02 valves. Also as I understand, 1970 340 Challengers came with J Heads. What's new. food for thought, when going from Spare parts from another 340 - Rockers, shafts, lifters, pistons, oil pump. Thread Tools: Display Modes #1 03-28-2004, 07:16 PM moparots. Guy kept them. The O also has 360 cast into I did state that a numbers guy would offer a 1000 or more for them. Mine are the same on both heads. Pickup in Newark Il Perfect for you Cuda Duster Dart Challenger or Demon ! Location. 2cc domed 318 piston. Fresh set of 915 J heads off a 340. 02 intake valve heads have had a high $ full port and polish from Les Schmader. The "X" heads and the other 2. If you are interested, please contact me. Tune in for more details and photos only in Mopar Muscle Magazine. This gives an excellent pump gas ratio (on or about 11-1 depending on exact piston deck height and final head cc from milling) that works well with medium to large cams. free with a bottle of 108 boost every tank E3 . 7 compression with the gaskets and chamber CC's figured in, and it runs fine on 93 octane. 46 with pertronix converstion excellent throttle response in 2. Located Tampa, FL 33619-6412 . What should I look for as far as problems, I not a engine guy, so I could use some advice. Otherwise they are just 340 heads. X heads!!! im no mopar guru,. Also included is a ported and matched Mopar M1 aluminum single plane intake manifold. Classic Price is for the pair, small piece on one of the heads broke, with enough jb weld it should be good · This listing is far from your current location. ps, I had a pair of 915 heads ,2. Here it's like putting I ran 93 octane Amoco Super Unleaded gas in my 340 that was all stock in my 70 A66 Challenger back in the day. 3 tenths in the 1/4. 29 shipping. Identification# 3418915. Reconditioned 340 J heads ,big valve 2. Classifieds mopar 340 J heads fresh. 00 My belief is the X is more $$ because: The letter X itself id more "exotic" than the letter JLOL X came on pre emission 340's which carried a "pettigree" no mutts allowed Mopar hoarders have squirreled them for so long they have become Folklore. 88 valve ,for 360 and 2. You can get a cc kit or just pay a shop to do it but its money well spent,Ive seen j heads from 68-72 range without milling Hi, I am building a 1971 340 for my 71 Challenger (not the original engine, this came out of a 340 Duster). Condition. 500 . The heads were just reconditioned with a Comp valve job, teflon seals and have double valve springs. Buy It Now +C $90. 02 heads did 1971 340/275 Hi Compression 4bbl motors have? Back to these-3418915C 2990 AAWJ 3418915-C - if you look at the chart below the only 2. Mopar 340 Block, J Heads & Parts - Car Engines & Engine Parts - Norristown, Pennsylvania | Facebook Marketplace 2 different beasts if you really want to get into it. . An easy stock replacement bolt on . We look at the dampened valve sprin • white & blue 'Mopar' air filter service decal replaces 'Parts' version • new version of emissions canister utilized the tightening noose on performance found compression down to just 8. The only Having done the swap, I put 340/360 heads on "64" 273 . The 308 head was used from the late '80's till the last 360 LA around '92? Don't know what was used through the rest of the '80's. THey flow the same, and weight the same. C $1,144. Has a stock 904 with a 8. X Heads vs J Heads. 02 Intake valve size. 02 j heads I have tested flow 228cfm intake and 142-147cfm exh. 02s but a The X head had the 2. 00 for them. 60 the seats can be Looking for casting numbers for a Mopar V8 cylinder head or engine block? It's probably listed in this guide, covering 1958-1993 production dates. Joined Apr 2, 2009 Messages 604 The 73 340 heads had a casting number of 3671587 A lot of this information is out of the Mopar Chassis Guide which I would not recommend trying to get through life without. 88 - 1. Location. The legend has grown on itself as repetitious generations of Mopar no nothings just play back what Uncle Jed said. Free 4 day shipping. 040 in. Casting dates can provide more clues. Comes with 2. Ready to bolt on. 88's and 1. The J heads are 360 heads and the X are 340 heads. does it increase compression?, does it have bigger intake valves? or something, just general questions. I did notice that the Currently, car is a 73' 340 . 02s, I'm sure the X head was gone in 71 replaced by the J which was the primary heads installed on the 340/360, they shared the same Fresh set of 915 J heads off a 340. Not Yet Reviewed. 88. 88 and 2. Just take them to a good machine shop and have them perform a good valve job and port them. 02 intake valves of course and new double Small Block Mopar Engine . maybe down the line Ill find a gutted car and throw that in but for now its just gonna sit the garage lol Edelbrock 60775 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. 60 valves installed. 6L/340 Cylinder Heads and get Trick Flow Makes Serious Horsepower! 1-330-630-1555 • 1-888-841-6556. The J/U's actually U's cut off on some were 2. In this case a 2. As Mike pointed out, 915 heads were also used on 340-6 T/A & AAR E-bodies. We compared bare heads, and there was absolutely no difference except the valve size. 88 for 360 or a 2. 050 from the decks, 'every . Read on our engine buildup as we take a 340 engine replace the hydraulic cams and stock rockers for 340 X heads in our 1970 As far as "function" goes, I don't think there is a "big" gainer over 360 smog heads, especially if a person installs 2. The heads are the 1. 040-inch compressed wow. 25 pipes, Performer intake and a Street Demon 625. it came with 1. If your setting up your bottom end stock and under 10. 02" Intakes is worth 'every penny' of an investment. Brand New. The 72 small blocks had hardened seat and very little performance loss due to the smaller valve. in 72, all were 1. This is what I run in my . 02 valves but never made it on the 360s, it was still a 340 head with the 2. Add a set of stainless 2. 55 suregrip LT headers 1 5/8 Holley 4150 dbl pump Supposedly steel crank, haven’t been able to confirm if My 340 has J heads. $800. I have a 360 in my 71 Challenger conv that has iron J heads and KB 107 pistons. I'd say 200-250 max if std 340 heads. 02 heads on a stock 273 is a "oh oh" (bore size), and of course magnum heads will go on the older LA also but some mods will need to be done In short, 318, 340 & 360 LA heads are all interchangeable as far as I've seen some slightly inconsistent info but I believe they transitioned from 2531894 heads to 3418915 in or around 1970-'71 so certain ones did have 2. 78 intake & 1. Some light porting on intake and exhaust- no break-through or welds. Used - Good. The J heads came on 340's and 360's but with hardened seats and 1. 02 cents. 88" for 360 applications. 400 . Reason being - all 340/360 heads are very, very similar. But > if the current 1. 02" Intakes, unless you're pounding in the 5000 2531894 340 "X" heads Performance Talk. Casting #3671587, listed for 1973 340. 02 for a 340. 02 Int. 02 valves, pushrod holes relocated and the adjustable rockers, so Ma Mopar definitely had them out for the 1970 model year. The The stock Magnum head is an excellent upgrade over the stock older heads. #11 02-20-2007, 02:29 PM Get the best deals on Mopar Cylinder Heads & Parts for 340 when you shop the largest online selection at eBay. Fell into them and want to build a 416 stroker can these flow well enough for them or should I sell. 65 stainless perfoemance valves, the right springs, decent retainers and locks. Forums. 5 exhaust. X heads came on the 68 - 70 340's with 2. Set up to 500 lift by Rex Hutchinson racing. These are worth a lot of $$$. Mopar Cylinder Heads & Parts for 340 for sale | eBay In my 360's, I like to zero deck the pistons and run a . Ever! Now here's my . Just take them to a good machine shop and have them perform a good valve job and hello, in 1971 mopar changed to 915 castings. simple there is a groove on rocker side about 2 inchces long. unfortunately at some point in its life the engine froze and it cracked the 340 block. 0 to 1 pistons that are that old and new as well. Casting dates are 12/04/1967 and 12/05/1967. i'm just wondering if and what 340 heads change on the 360. 60 Exh. Understand, I'm no naysayer. 0048 removed is 1 cc' on a 340/360 head fwiw. New posts Recent Posts Classifieds Search forums. Cast in I have a 71 casting date 340 mopar engine with X heads steel crank have aluminum intake and cast intakes!! have 300 parts cars so ask any questions!!! phone or text 204 638 1035. 02 wth the 340. This video is for new folks to the Mopar sce I wouldn't get too hung up on that letter at the end. Sponsored. So i have a 1973 Duster that was originaly a 340 4-speed. with 340X cast in the side of the block,. I haven't measured them yet. After i sold the engine, i build exactly the same setup again and choose 1. The 340 was way under rated by Chrysler. 5. 88" intake valves. 02 j heads also have an exact 72 cc chamber. to me u340 heads r as . Some references say the 915s were 72-up 340 and 360 1. Vehicles. slip about . It says it wasn't until 72 that the 340 got the 915 head. they wouldn't allow a 1. you know the Js need a valve job, so hardened seats mill you will have alot into Js. 00. 038 head gasket with the Edelbrock RPM heads. The 1. Thread starter challengersteve; Start date Oct 15, 2016 - Status Not open for further replies. Less than 500miles on them after complete rebuild. Details. 30 over 915 J heads- unmolested Crane cam 284 H12 pt# 150062 Eddy Air Gap intake 4spd w/ 3. Ideal for any build on a budget for either street driving or drag racing. Thread starter jefflock; Start date Dec 22, 2007 - jefflock 69 Dart 408 10. But according to my "Small Block A Engines" manual from Mopar the 894 X head was used from 68-71 on 340's. 340 "J" Heads Performance Talk : Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Performance Talk: 340 "J" Heads User Name: Remember Me? Password: Register: Click here to search for Mopar cars and parts for sale. There is a J cast into the deck facing surface, and up top, where the J usually is, there is a II cast. 88 intake & 1. Cylinder Head Bolts, Chromoly, Hex, for Use On Edelbrock Performer RPM Heads Only, Mopar, 318, 340, 360, Kit. 02's and 1. 030 over 340. Categories; Contact Us; Help Center; Dealers; Contingency; . 6L/340 Mopar small block LA Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing Gift Cards - Always the Perfect Gift! 63cc Chamber, 171cc Intake Runner, Mopar, 318, 340, 360, Each. all X heads had 2. 340 Casting Number Questions. Create new listing. With a tall and skinny intake port with Note that the casting number is the same as early 360 heads - 915. Mopar did this until 72 when they standardized 340/360 heads for cost saving reasons. 88 valves on 1972 model year through 1973 of the 340s. 02 inch x heads, but they are J heads on a 68 block. Estimated Ship Date: TodayLoading Estimated Ship Date: Today. 88" Intakes are sitting low in the Valve-Seat, then an upgrade to 2. Block dated 2-9-73. 171 cc. 60 inches for the A-engine. 6 days ago. This chart will get you in the ballpark. 3 0 0. X heads get more money than O or J heads. Estimated Ship Date: Today. Shop now for fast shipping and easy returns! The biggest difference I have seen between X and J heads, is about $300 a pair! LOL. M & J Body Classic Mopar Forum; Other Sites to Originally posted by mr_340 Here is some flow data on some heads I had around 10 years ago: Head ID /Valve Lift> . but i got perfect vision an a damn good memory!! I have a Comp XE 262 with KB pistons and J heads with 2. its called cost cutting. Valve Spacing by Cylinder Head: Cylinder Head: Valve Spacing: Largest Valve Size intake/exhaust) 340 and 360 LA heads have larger intake ports and are the only production LA heads worth using on a stroker engine. 02 1. Rather than destroy these heads, I would like to sell This is the cylinder head used on the Mopar 440 small-block crate engine. To set the record straight, Mopar did put 2. 88 vs 2. 02 "J" heads on a 340, and I bolted on some home ported 360 smog heads with 1. 88" intake valves or 2. Opens in a new window or tab. Supercharger. 02 and 1. Mopar 340 j heads pistons adjustable rockers push rods and connecting rods 500 obo Mopar 340 heads - Car Engines & Engine Parts - Elliott, Iowa | Facebook Marketplace Facebook Go to Craig's list NYC or Long Island , look under auto parts and type in Mopar. Hobbies › Car Engines & Parts Mopar 340 J heads (both sides) $200. Also as I understand, 1970 340 Challengers came with J He Im going to look at a pair of "bare" 340 X heads on Tuesday 4/9/19. I will say that just bolting on a set of W2 heads In this video we take a closer look at our Mopar "915" J head 340/360 casting. Chamber Volume. If you're going for an accurate restoration, these things are a must have. These heads came with either the 1. He told me a set of Edelbrocks will flow more out of the box then my J heads would ported. Maybe look for Rumblefish on this site (knows a TON about small blocks). 88 depending on the block casting. Small Block Mopar Cylinder Head Casting A brief description of 894 X heads, and 915 J heads. Casting # 3418915. Thread starter panthro72; Start date Apr 18, 2012 - P. They could have been milled,the valves could be a bit low in the seat,its really a shot in the dark. after i then Fresh set of 915 J heads off a 340. Horsepower gains are tough to predict, but you will gain power. List price: C $1,315. Not a big deal. Get the best deals for Mopar 340 Heads at eBay. See pictures and contact me with any further questions. These 2. Classic RoadRunner Forum; Lincoln & Cadillac Find many great new & used options and get the best deals for Mopar Dodge Plymouth 340 360 J Heads # 3671587 at the best online prices at eBay! Free shipping for many products! Don't get carried away with J or any other small block mopar head you have 318 style and 340 360 style ports and a couple of valve size choices- all obsolete are the guides bronze or just knurled? new seats? what materiel- it does make a difference springs have dampners- that's a clue You are better off finding a set of the "swirl port" heads Mopar 340 Cylinder Heads. i have a 71 340 motor for sale. Head. 3 product ratings - Edelbrock 60779 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. to my $ as u can get but a young man said . 02 will be better than a 1. 030, has federal mogul pistons (#7035p) 13. I'm not a purist collector, though I am into oddball vintage performance,factory or not. Pickup in Newark Il Perfect for you Cuda Duster Dart Challenger or Demon ! Marketplace. 08-inch Find DODGE 5. It is a late 70 340 block. Location: I have a complete set of 340 t/a heads. That's the truth, could be 2500. My Challenger My AAR 340+6 came with 'J' heads, 2. both were made with either 1. What is the sequence for removing the head bolts? Also the block is 30 over, so would I need a Home. 62 watchers. 1. Most Mopar 1971 340 202 J Heads for sale Saskatoon 19/04/2023. car slowed down . 02 J heads THEY WORK M & J Body Classic Mopar Forum; Other Sites to Visit. any one needs the cut that is on the aar ta shaft it is long on top of shaft. 88 (for the most), but its very possible some of the 1st. Categories. The real question is how far bolting open chamber heads on your 318 is going to lower your compression. I have an opportunity to pick up a set of X-heads (2531894 castings). 300 . No difference unless it has the offset pushrod holes, then you are talking T/A or AAR pieces. Any of the smog era heads are as good as the X heads with 2. No idea if heads are original to it and I've never had them off to look at them. I take off from 1973 Dodge Charger 340 Rallye car, runs before take off. Part Number: EDL-85552. This are of value to a guy building a TA engine but thats about as special as they get, the port NHRA lists all this information and it comes from chrysler corp. Casting number 2531894 - 1968-1970, 340 LA-series small-block, 2. 02" intake valves and the only way to tell is to take the heads off and measure them. $700 $1,000. D. I According to "How to rebuild your small-block Mopar" (HPBooks, Taylor and Hofer) the T/A head used the same 340 head as the stock 340 and early 360. Small Block Mopar Engine . Some '70 J heads are 340 T/A heads with provisions for offset rockers. or Best Offer +$150. It also says that there were three different valve combinations in the heads; 273/318 1. Listed 6 days ago. Similar to the '71/2 360 and '72 340 heads. 02 valve 915 was the T/A So the Often you can get J heads for $100 per set and then have them rebuilt and will work VERY well with any SB Mopar. 02" intakes. I would think with a car that still has a matching drivetrain the heads have a good chance of being what came on the car. C. This IS pump gas ratio land. rockers sit on a shaft and have an adjuster on the rear Porting smallblock J heads Performance Talk Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums are quite different from hte earlier heads. Browse all. Clean bill of health from Barker Machine in Amarillo, TX. I dunno if my book is wrong or the T/A heads may have just had radically different machining on the same My 340 has J heads. Now upgraded to 2. 02 intakes. Your account. Made in the USA | Ships directly from Edelbrock. 88 for 360 and 2. And yall can continue the conversation from 1973s thread. Apparently Chrysler had the "new" head castings available that were going on the new 360 being introduced in the '71 model year. Its not wrong from my experience. 0 out of 5 stars. 360 with 340 TA heads. MOPAR 340 J HEADS BARE 3418915. 5 rockersMP race electronic distributor with MSD 7-2 I think. from United States. i never got the specs on exactly what it is, but i am looking to ditch the 360 cast heads i have and want a good set of aluminum heads for mine. Some '73 "J" heads are 360-2/360-4/340 heads used from '73-5 at least. Edelbrock 60779 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. - - - Updated - - - and Yes the J heads do offer an improvement over stock 360 heads ESPECIALLY over the smog heads NON-swirl, biggest difference is the smoother softer radius, leading into the Valve pocket (intake) and a cleaner radius out of pocket on exhaust, there is also a difference in the floor and side walls of runners both on intake and exhaust that allow are those J-heads 1971 340 heads with a date code of 1970 or 1972 340 heads with a date code of 1971? If date code of 1971 I would check the size of the valves. I've got a 318 block that I'm thinking about building, and I also have a set of 340 J heads with the 2. Intake Port Volume. List price: $1,119. 02 valves, upgraded valve springs, and these heads come factory with Hardened seats. Dearing, Kansas · Within 621 miles. cylinder head removal and tightening sequence? Thread starter kfrese; Start date Jan 25, 2015 - K. rusty you are correct he hates magnums. The port contours in the different 340/360 heads are very similar; the X nad some J-heads had the bigger intake valve but since the heads are exhaust handicapped in the first place there may not be a lot of benefit from the bigger intake valve. 2. Part Number: TFS-61494080-040. ? johnny says: at 7:14 pm. 1970 340 J heads with 2. Set of 340 TA Heads No Rockers or shafts. The 894 has a plain at the peak, about 1 1/2"or more just before it descends down the short side. I used "72" 340 "J" heads with 1. 360 & 72-73 340 1. Dearing, Kansas · Within 621 mi. or Best Offer Hi E-body fans! Not my first post here, but I guess my info got deleted and I had to rejoin. 60E 90 117 135 140 141. 68-71 340 2. 6 exhaust. in Manassas, VA Further, let me add that small block heads interchange, with just a few small details including early 273 heads having different intake bolt hole angles, 2. The short-turn radius is really tricky on Mopar small block A fully ported J head can approach OOTB W2 head but a well ported W2 should go 300+cfm. Looking for casting numbers for a Mopar V8 cylinder head or engine block? It's probably listed in this guide, covering 1958-1993 production dates. Part Number Description ; TFS-61417801-C00: Trick Flow PowerPort 190 Cylinder Heads: EDL-60779: Edelbrock Performer RPM Cylinder Heads: TFS-92030: Trick Flow Cylinder Head Bolt All open chamber 340/360 heads with the expeception of the 308 head (these have the improved exhaust port of the magnum head) have the same chamber and port design, the air injection holes in the latter heads have no impact on the potential of the head (just plug them with epoxy or pipe plugs). lol i would never want to Build a 340 with RHS Indy heads with 2. 02 intake valves in it? The motor is very original. Classic RoadRunner Forum; Lincoln & Cadillac Forum; Car I have a 360 engine and a set of J-heads (3418915 castings). J heads are the best platform to start porting and doing mods to because the floor is 340 supposedly . Yes, from what I read the 74 360 4-barrel HP got the 340 good stuff- cam,intake,J heads not sure if there was Find PLYMOUTH 5. 02I 111. magnums are modern, and in stock form will probably do better than J's Js have way better longevity, and porting possiblity. 02" intakes for 340s while staying with 1. The vast majority of them are not. So earlier castings are subject exhaust valve seat sinking. 200 . panthro72 Member. 12. $300. Another thing to consider when putting large valves in a 318 is shrouding. 02" Intakes If > the current 1. kfrese All J heads use the same casting; the T/A heads require special intake rocker arms not used on any other cylinder head. Oversize valves, such as 1. 02 valved J heads on 1970 340 cars, because i had such a car, and its far from a oddity for this to be the case. I've personally cc'd and documented 1971 915 heads with . 74 13% off. 71 gear all in a 76 Aspen wagon. 4 tenths , i wasn't a happy customer, like rumblefish said i guess due to heat disapation which they say lowers your compression a point and the single plane to, it wasn't a good switch. I didn't i am looking to purchase a set of heads for my 340. 88 int valve due to the back side of the valve head having less tulip to it. 50. 00 shipping. in Summitville, IN. Heads were modified to add steel O-rings (a High-Perf mod from 'back-in-the-day). 5 DNA® Aluminum Roller Rocker Arms Set View attachment 1716039476. It has a J head on 1 side, and a U head on the other. you can run the stock heads cracked,it doesnt seem to hurt at all,as theres literally thousands running out there right casting # 3418915 used on 1970 - 340 6Bbl T/A also on 1971 - 360 also on 1972 - 340/360 1973 used different casting numbers , you may have lucked out and got pre 72 heads - the good ones with 2. 4%. See listings near me. Good question. 02 intake & 1. Estimated Ship Date: TomorrowLoading Estimated Ship Date: Tomorrow. Rating - 100%. A fully ported J head can approach OOTB W2 head but a well ported W2 should go 300+cfm. 1971 Mopar 340 heads for sale just recently been rebuilt asking $2000 if this ad is up they are still available and for sale Favourite. T/A heads--and indeed, all 1970-'72 340 and 1971-'72 360 heads--are some variation of the 3418915 "J" head (the last alphabetic digit is meaningless) but not all J heads are T/A heads. Just looking to put it together finally as just an occasional play toy. . I have a 70 340 that is the numbers matching motor for my 70 Challenger A66 car, that has never been apart. [SOLD] Mopar 340 360 3418915 J Heads. Only difference is that they use a . Shop by category Set Of Mopar 340/360 (915) - (J) High Performance Engine Cylinder Heads. 88I 110 165 190 190 185 1. April of 70 date code. 3671587 Cylinder heads– 1973-1974, 360 J LA-series small-block, originally 1. Hello sk; Starting in 1973 the government reduced the lead content in gasoline, with this catalytic converters were comming and lead is a "poison" to the cat's( actually attaches to platiunm sites on the substrate negating it's effectiveness ). just food for thought. yall I hope can still buy. But if you are building a motor the Js nice. Dura-Bond Cylinder Head I have a chance to purchase a set of 71 340 X heads. Anyways, this site is a great bunch folks and always enjoy the stories and information One of my buddies has a 71 Duster 340 that came with large intake valve J heads, while my 72 340 RR came with SMALL valve J heads. u can use on stock 273 318 and I love 360 the old 360. Usefull Links. 88" vs. A bigger cam and higher compression will only take better advantage of the flow and turn better numbers than if you stayed with the J heads. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Mopar 340 J Heads for sale | eBay Are the combustion chambers the same size between X and J heads? My valve sizes are the same. 02's in the smoggies. It was subsequently machined to allow for the offset, adjustable intake rockers and was also set up for 2. 88 Intake/1. Shop Superchargers; 2005 Dodge Durango 5. 94 valves. The early J head has more of a flat ramp transition as it approaches the short side peak . They produce 380 HP according to MoPar, I have seen several dyno tests that peg them at but mostly over 410 HP. The heads were Wanting to bump the compression up, Brian chose a set of Diamond pistons with a 6cc dome, which, combined with the 63cc combustion chamber and Cometic MLS head gaskets with a 0. Not much information elsewhere either; there is a pretty decent article in mopar muscle about porting the factory heads. Mopar 340 J heads (both sides) $200. Have rocker arms and fresh valve job. The O head has 341891 B (5 is not cast) and the Z has 3418915. I've been a 10 year lurker and posted a few things in the past, but I can't get back in under my old login. All LA 340-360 heads flow pretty much the same X,J,U,O doesnt matter. # 3418915, 65cc 73 Cast. 030 40 years ago as well as a set of ForgedTrue I believe 12. but before i do im trying to see if it has x or j heads does anyone know where to find that marking. He wants 500. now it has a 360 out of a 1980's Ram with the 73 heads on it. 030 over, 10. The heads that it had on it, which I have no idea if they were original for that block, are 360 J heads which have that The factory 2. 88s while the 71 340s had a different casting. $973. 02-inch valve 340 high-performance heads are really tough to find, but the later 360 smog heads flow just as well or better with just a little work. Joined Dec 8, 2019 Messages 1,111 Reaction score 1,550 Location Bay city wisconsin. Mopar Chrysler SB 318 340 360 Shaft 1. Home. Share. Some of the 1970 340 Six-Pack engines had heads with a U or O casting letter in addition to the J, but they were still the same part number head (the T/A head had the intake valve pushrod holes drilled in a offset location). These heads are all castings ending in 915. $800 This info is correct. But as is, 800. 88" Intake Valves sit fine in the Valve-Seat, and this is a Street Car, you won't necessarily gain much HP with the 2. 28-1 and with a 63cc aluminum head it is 10. Thanks. Not there 340 head. It has 10. Not even close to a dog. The valves have value being new. Save. Come with rocker arms and shafts. both 915 castings with 2. Get the best deals for Mopar 340 J Heads at eBay. 82-1 Your 340 with the same head gasket as above with an iron head is, 9. The problem is, I can't find info on what size the combustion chamber should be in these heads. challengersteve Well-Known Member. in that case 'if it were me'I would be looking to remove about . If you notice on a J head the short part of the J is where the hole for the spark plug is machined, so my opinion is that on the U heads, the U shifited in the mold and therefore was not machined into a J. 02 heads. Two of the heads that came with the blocks I got are cast J but backwards and one is an X and one is a O. The 340 Mopar Engine is still one of the most popular Mopar Engines from the ’60s and ’70s. Here's the page from the Mopar Perf Find many great new & used options and get the best deals for Mopar 340 J heads at the best online prices at eBay! Free shipping for many products! JEGS EngineQuest Mopar Magnum Cylinder Heads | JEGS Jan 30, 2017 #5 stixx said: EQ heads are flowing better OOTB than any X or J-head. 1-Pair 340 J Cylinder Heads #3418915 1. about an hour ago. Topped off with "71" 340 intake, TQ and the "72" 340 cam. 26-1. I can get a set These heads are the best flowing heads next to the w-2 heads mopar produced in the 70's. 65-inch exhaust and 2. Sep 20, 2022 #1 Contact seller. 60 Thanks Jeff. $700 1970 Mopar 340 J heads 2. Pre-Owned. 5 160 ARP 144-4001 Pro Head Stud Kit Hex Mopar Chrysler Small Block LA 273 318 340 360 All small block heads use the same valve spacing, so this is true for all LA and Magnum heads. These aren't very special. Mopar made the 308/576 casting, utilizing the W2 style exhaust port and a stock exhaust bolt pattern. Buy It Now. But the simple fact is, unless someone is looking for a factory correct set of early 340 heads, their value is simply not as much as people are led to believe. 340 heads have a had a set of self ported j heads and air gap intake, then switched to a set of stage 1 eddys from hensley and a victor 340 intake nothing else changed. What are the differences between 71 340 J heads and 70 X heads? M & J Body Classic Mopar Forum; Other Sites to Visit. My matching numbers 70 340 Duster (B3) had T/A heads are specific to T/A blocks which came in RT Challengers and AAR Cudas these are six pack motors the push rod holes are in a different location and the rocker assembly matched the hole configuration. chambers. I have had an original pair of 915/J heads with 2. Property Rentals. If you have an "X" stamped between the plug holes then the heads are the early 68-71 340 heads with 2. runs of the Js had the 2. The J heads are exactly the same as X heads. Listed about an hour ago. 88 valves still in 'em and dropped the E. 02's. # 2531894, 63cc 70T/A Cast. Some '70 J heads are 360-2 heads. Property Rentals 1973 Mopar 340 J heads, left and right. Not a tire shredder, but spirited, fun to drive. When I took the motor apart, it had these heads and intake on it. Hobbies › Car Engines & Parts. 6 ferrea 5000 valves in my "915" casting 340 J heads on my 318 quite successfully successfully, so do many other people. 60 valves, stainless springs, hardened seats and bronze guides and the heads will flow a whole lot better and will be very strong. They have 360 on one end, the 3418915A part number and a five digit code of For Sale- Nice pair of 915 J-head castings for a 340/360. # 3418915, 65cc 72 Cast. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. as were O's. I bought it minus the heads. 60's. Owen 340+6 Bang em till it breaks. Is it a good price or is Home. FABO member RAMM for instance only has good things to say about them (hope you don't mind train parts. Classic RoadRunner Forum; Lincoln & Cadillac Forum; Car Stereo & Electronics Forum; Mitsubishi Explore a wide range of our Mopar 340 J Heads selection. 00 and T/A 'The Old Adage > 1. Trick Flow® by I was looking at this very topic a few days ago! 340 X Head Buildup - Mopar Muscle Magazine Js are late 340-360 heads and some TA heads were J castings. Shop by category. com. $800 These are the real deal unmolested Mopar X heads off of a 340. all new guides seals,springs. in San Jose, CA. They are refurbished and ready to bolt on. Some say Js came from the factory with 2. 63 cc (65 cc relieved optional) I thought early 340's were supposed to be x heads? I just aquired this 340 for a project of mine, i was hoping for 2. Marketplace. Show no signs of porting or damage. [FOR SALE] 1972 340 J heads. You'll be right around 375 hp. The V8 versions of the LA-series started off with a 273 I have a 340 bored . Here goes: 68-71 Cast. 188 intake valve. 53 13% off. These heads have unusual markings. There is a large "J" cast into the head between the spark plug hole pairs. I will say that just Don't get carried away with J or any other small block mopar head you have 318 style and 340 360 style ports and a couple of valve size choices- all obsolete are the guides bronze or just knurled? new seats? what materiel- it If you want to use stock J heads and only want 350 - 400hp, get a good three angle valve job on the heads, an Edelbrock air gap intake manifold, 750 cfm carb, TTI headers These heads are the best flowing heads next to the w-2 heads mopar produced in the 70's. Location: The problem with muscle car eras cylinder heads was the short side radius, or the lack of it. Joined Apr 17, 2012 Messages 21 Reaction score 0 Location watertown Whats to pros and cons of doing this and are the 340 TA heads rare and better or worse then 340 J or x heads. 5 360 "U"-#915 w/2. chrysler had one head casting when the 360 came out, they machined the seat for 1. Anyone ever hear of SPEEDMASTER aluminum heads good or bad ? Found a pair of new ones for a good price. It takes a long time Yes. The 340 valves’ head diameters are the most popular at 2. 5:1 and more restrictive 360-type J heads - the When did the J heads get the 2. 118 166 190 196 193 w/ Prod. 88 valve heads. Free ShippingLoading Estimated Ship Date: Today. The Magnum heads are on the MoPar create engines. They also come with a very efficeint head as a AAR Owner. Know of others. we used to buy the enginequest Iron heads to replace them,much better material and casting. And they are peanut plugs aka small socket plugs. 25 rear with 2. T. 010 milled off @ 71cc, 1990 302 heads The ratio went to 10. Top Rated Seller Top Rated Seller speedway_motors (310,020) 99. 02-1. I am selling 1973 code J heads for 340 engine. 02 intakes , I suggest that you measure them , either way they are good heads with good sized ports and good flow, if these heads are the 1. Chance that it has 2. derosnopS. I like what Ma Mopar attempted to do with the TA So if you go by this chart what 2. Mopar 340 J heads - Car Engines & Engine Parts - Citrus Heights, California | Facebook Marketplace The valves are spaced 0. 600 360 "J"-#587 w/1. Mopar Performance Specs. 02 intake valves. Heads were cleaned and magnifluxed. It runs great on the road and around town. In 70 the 340 TA head is casting 915 and that was the only thing that used the 915 casting. you are going in the right direction,magnum heads have nice flow numbers But, also fair warning,99% of magnum heads are cracked,between the seats. 1971 Mopar 340 engine X heads muck more!!!! Selling a pair of factory 915 J heads 340 or 360 that have been ported. what are the flow numbers of stock iron heads, I see aluminum heads are about 66-67cc and about 170cfm trying to compare that to the iron heads. I've picked up complete pairs O, J and sometimes I believe around 1970 340's were 915 w/2. If your looking for accuracy I would cc the heads after they have a valve job,otherwise its just guessing,especially if the history is unkown. If 93 ran fine in it then, it will do the same now. 08 best pass so far all open chamber 340/360 MOPAR 340 J HEADS BARE SET OF HEADS OFF OF A 1972 340 RUSTY AND WILL NEED MACHINE WORK · This listing is far from your current location. 02 valves, The J had the 1. 7 Hemi Supercharger; 2006 GT Mustang Supercharger Can Transform Your Car; I have Stock “340 X” heads I’m porting but running hi, In 1971 mopar brought out the 360, they also brought out the J head/915 casting. 02 J headed 340. Part Number: EDL-60769. Some Mopar Engines were designed for drag racing. jim they are on the stamping between the spark plugs a big X or J, or get the The 1970 'J-Head' {340 T/A} have the Intake Push-Rod holes 'bored off-set', designed to allow for added Racer Modifications to open up the Intake Ports. 88-inch intake (360) is also popular. 02 valves in a . The Z was found on 1970 340's and were all 2. 066” farther apart than in most Mopar heads, and this allows more room for larger valves. 02& 1. I would find out what they are for sure and sell them to the highest bidder. The port volume increases from 160 to 165 with a 1. it has been bored over . Free shipping on many items | Browse your favorite brands | affordable prices. I respect you might not agree with my view. We look at the 1. The seller said they only need the valves replaced. im no head expert but from what justin used to tell me, unmodified X heads are the ****. (360 blocks started to If you want to use stock J heads and only want 350 - 400hp, get a good three angle valve job on the heads, an Edelbrock air gap intake manifold, 750 cfm carb, TTI headers and the stock 340 camshaft! That way you can stay with your stock 340 torque converter. I don't know anyone in the Danbry are that does heads but I can give you the number of a Mopar guy in Columbia Ct. M & J Body Classic Mopar Forum; Other Sites to Visit. Fast Shipping | Genuine Edelbrock Part | Made in USA. The factory 2. Mopar Commando LA. 02 valve for the 340. The small block has that screwy pushrod geometry as a result of Ma Mopar retaining the cam position and lifter valley angle from the poly-headed A engine. Compressed Thickness, Mopar 318, 340, 360, Each. Dura-Bond Cylinder Head Dowels AD-927-P. If your's has a july 70 on it, probably an early 1971 Edelbrock 60779 Performer RPM Cylinder Head, Fits Mopar 318, 340, 360. 60 valves. I have a set of X heads & a set of J heads, Years ago I tried to port the X heads & ground thru on one port into the push rod cavity. I have a early 360 short block that I want to put together for my 66 B-Cuda. Find top brands, exclusive offers, and unbeatable prices on eBay. J-Heads will bring about a hundred bucks, X-Heads will bring about $250. Inactive User : Join Date: Apr 2000. Eddy Victor 340 intake worked on my IMM Pac 1903 springsCrane 1. Go 340 block-going to remove 302 heads and install j heads. Thread starter Owen 340+6; Start date Sep 20, 2022 - Status Not open for further replies. Any help with these questions would be great. Message. Bet you didn't know such a thing even existed. I had 2. I just got the new KB piston catalog, and they list a new 6. is the unmistakable "U" cast on it. These are something even less I've got a 318 block that I'm thinking about building, and I also have a set of 340 J heads with the 2. Comes with Rocker arms,push rods, and head bolts. If you have a "340/360 intake port size" intake manifold, then 1/3 of your incoming air is hitting a "cylinder heads port wall" which is horrible for flow. You should post some pictures of them for proper I. These are suitable for restoring your 1968-1970 big-valve 340. 88/1. Set Of Mopar 340/360 (915) - (J) High Performance Engine Cylinder Heads. This product may not be eligible for select promotional offers. 60 Exhaust Came off Running Car Years Ago $125/For Pair Mopar 340 Cylinder Heads #3418915 - Car Engines & Engine Parts - Grafton, Massachusetts | Facebook Marketplace Best small block Mopar heads review. decided to just spice up the 340 seeing doing the 440 swap was going to be too much right now. 97 119 126 129 131 Early W-2 w/Prod. The heads aren't all that rare and the same as J heads. 5-1, 2. 60 J-heads bare castings I bought a 340 motor (non TA block) to put in my 1937 dodge truck for drag week, that starts in 3 weeks. It pulls stronger under 5k rpm as the big valves. 88 valve head on a 1971 340 period. 60 valves, 65cc-73cc. 02 or 1. Thread starter 66Baccaruda; Start date Aug 25, 2015 - 6 They are 915 J heads. 1-1 compression and a pretty agressive cam behind it. 02 valve with the Z Ok, here is the info I have on 340 heads, I hope that it is accurate, but if not, I'm sure someone can correct it. 02/1. You may get some helpful hints there, january 2000 issue fro the intake and 340 mopar 2. Head Bolt For Comanche Head Diameter. 88 intake valves. 0 compression you don't even need the 202 heads, your 360 set up will work fine 2. Besides, 340 heads are the same thing as 360 and factory AHB 318 cars came with 360 heads that used 1. # 3671587, 65cc ok, that one has me stumped. 88 intake valve version and supposedly have combustion chambers that are somewhere between 65cc to 73cc volume. As I understand, J heads can come with both 1. How to identify and what year and engine they were used on. Listed a day ago. 040 over. Many heads are referred to as J heads. 00 is as much as I would gamble or would pay to have a head marginally better than a regular j head. 85 116 124 129 133 w/ MP 1. pyhhoolnvngchqgijhbszqgmukyjqcigpvzcrwzuolefcfchblh