Mopar 340 x heads cc diagram Here is what's happening. 5 or 1. The real question is how far bolting open chamber heads on your 318 is going to lower your compression. If you're trying to keep the CR low in a road car, suggest the 72-73 stock 340 piston. Note; The looking for heads for my 340. Joined Apr 23, 2007 I'm gathering parts to build a street 340, 400 HP goal, for my 71 Scamp. Please Contact. 02/1. 6 (O, U) casting #3418915- 1971-72 340/360 open chamber 1. 02s but a book i have says they were all 1. Mopar 340 Heads; 440 Mopar Heads; 360 Mopar Heads; Mopar Aluminum Heads; 340 Mopar Motor; Mopar 360 Heads; Mopar 360 Aluminum Heads; Mopar Small Block Cylinder Heads; No way will an actual 318 head ever run with a 340/360 head and I don't care how much grinding you do on it. 02I 111. I’m building a 340 for my 1988 dodge short bed truck and drive it to my 41st Daytona Turkey Rod Run Thanksgiving. 00 forged crankshaft, scat rods, 585 lift cam, Victor 340 intake, 11:1 Diamonds, worked 950 Holley, etc using ported J heads? What would be the HP limitation by using these? Only asking because I have the chance to save over $1k by The "X" heads and the other 2. Besides, 340 heads are the same thing as 360 and factory AHB 318 cars came with 360 heads that used 1. The port volume increases from 160 to 165 with a 1. The heads have been hot-tanked and Magnafluxed so they are clean and have no cracks. Head. X heads were all 2. 88 valve engines do you think Edelbrock would be bothering to sell a different head for these two applications? 302 heads $250. 040-inch compressed Find many great new & used options and get the best deals for 1968 Dodge Plymouth MOPAR 340 X Heads 2531894 at the best online prices at eBay! Free shipping for many products! Note; The Intake Ports were a miniscule amount tighter than the 'X-Heads' at 158 CC's. 5:1. It also cracked on the outside of the head near the end Small block Mopar 340 x heads with all new valve guides and harden seats done by JW Croft at Croft machine shop 2. Any help with these questions would be great. Don't skimp on heads to save compression. 6-61. Thus in a dart sport. What changes compresion ratios would be a change in head cc's, new pistons/bigger pistons and head gasket thickness. When I did I put . Interestingly, these same smog heads were the recommended heads for Grand National racing when the Wedge returned to NASCAR, and in modified form were used quite a bit by Richard Petty in his domination of the circuit in the early 1970s. I wouldn't get too hung up on that letter at the end. Free Shipping Yes, double/triple checked TDC when degreeing the cam (with piston stop) and compression is a bit over 9:1. If the engine is a lower comprewsion engine, the Edel. 030 flat top pistons that sit at true zero deck with 2 valve reliefs, -5cc if I remember correctly. It's why I recommend aluminum heads unless iron is required by the rules or I’m building a 340 for my 1988 dodge short bed truck and drive it to my 41st Daytona Turkey Rod Run Thanksgiving. We thought they worked pretty good until we got the first set(1979) of unported(but p There is a pair of 915 heads on ebay,search under mopar 340 heads. If you have the heads, and want to bolt them on your engine, you will increase your horsepower for sure. 220 at max lift and is IMO a little shy of what he could use. 5 60 127 3418915 1971-1972 71 69 149 4027596 1980-1984 71 65 149 4323345 1985 --> 74 62 150 4323302 1985 --> 62 54 118 Porting Small Block Heads: The impetus to consider modifications to the ports of modern small Have a fresh set of X heads that flow 240/165 @ . Also should i put a dab of rtv on any of the head bolts,and if so witch ones. See arrow, cylinder 7 below. 500 . I'm putting a 360 in my scamp come spring and am wondering about these heads. New Listing Original Mopar 340 X Cylinder Heads Dodge Duster Plymouth Barracuda. I have a 69 Barracuda 340 notchback, 727 torqueflite with b&m transpak, full MSD ignition I thought stock 340 pistons were above the deck. Some of these take weeks to do. 1971 Mopar 340 engine X heads muck more!!!! Edmonton. 1. 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 Find DODGE 5. It's good for stock and that's it. Anyway, a hemi gring cam, LB4B intake, Holley 600 DP and headers this ran mid to high 13's in a 69 4 speed Dart. So if you go by this chart what 2. 4, and magnum heads shave . I have Stock “340 X” heads I’m porting I run the 292 mopar purple cam. roadblock_us64; Feb 27, 2024; WANTED - Mopar Performance Parts - WTB Head. 6L/340 Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing Gift Cards - Always the Perfect Gift! Cylinder Head, Performer RPM, Aluminum, Bare, 63cc Chamber, 171cc Intake Runner, Mopar, 318, 340, 360, Each. Small Block Mopar Engine . However, there were some very early 894 T/A heads which may not have made it RPM intake and heads w/750 cfm carb, headers and 391/410's and running low 12's. I think it is a horse a piece. Will the x The 340 heads flow approx. 31-inch) and some of the best production heads of the era; durability came from the forged crank, windage tray, bushed 6 Set of 340 TA Heads No Rockers or shafts. - - - Updated X heads are basically the same as J heads, yet they get mystical powers because they came on primarily 68-69 340's and fond memories. 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. Planning for a future build down the road. With a stock 70-72 cc head it would lower it even more and in my opinion make that engine a lazy dog. :cheers::cheers::cheers: mopar 340 x heads. Chrysler 318-340-360 c. 340 oiling system. I have the choice of using the J heads with stock valves, or using a set of 302's (thanks shawn). I have a bare 69 340 block 30 over and picked up a fresh set of stock 2. Next Last. 04 inches x 3. 87 (valve centerline to valve centerline) inches. These are bare castings $300 obo. I already have a factory windage tray, and a new HV Melling pump. 02 Int. Some early 1970 engines had them too as I understand it, but I can´t verify this out of my RPM intake and heads w/750 cfm carb, headers and 391/410's and running low 12's. 273 - 318 heads have smaller valves. What was done: 1. so that’s a definite. I would be concerned about interference with the closed chamber magnum head. 02 "J" heads on a 340, and I bolted on some home ported 360 smog heads with 1. 60 valves. 91's out back. WTB WTB DC/MP P4120960 Hemi Heads or Mopar Performance P5153875 Hemi Heads - will buy one or a pair. 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. 87 inches, but the W9 uses 1. 400 . heads are about a equal price and payoff. OK, I just was wondering if a switch to a 58 cc Magnum head was an option. Been gasket matched w bowls blended a little. I cracked on of the fully ported heads near the intake short side radius. If you don't want to do a striker, that's fine. I just read a mopar performance page that said on a mild to moderate build that the 302 casting heads would outperform the large valve j or x heads. But I guess you'd have to sell the Indy-x heads and you wouldn't have forged Hello friends. If it's going to see regular appearances at the track, forged pistons are recommended. 51:1) Small block Mopar (Dodge, Plymouth) 340ci 'X', BARE cylinder heads. Heads inspected before disassembly. Chamber Volume. 0 CC's larger Combustion Chambers than the earlier Castings. I have seen gifted X heads flow 240CFM, and 220 sounds like the low end of the casting,the bowls are wider than J castings by a bit. Most performance heads also use 1. I did a little reaserch and from what i was able to find they are hp. 10. 500 on the bench. Mopar 340 Heads; 440 Mopar Heads; 360 Mopar Heads; Mopar Aluminum Heads; 340 Mopar Motor; Mopar 360 Heads; Mopar 360 Aluminum Heads; Mopar Small Block Cylinder Heads; With 3. 1 May 24, 2020 #5 AUSTA Well-Known Member. I would expect a well done eddie My 318 (1979 block casting) was rebuilt 10 years ago and runs great. Thread Tools: Display Modes #1 Need stock head flow #'s for 1970 340 X Heads: head CC#s for X heads: 68Valiant: Performance Talk: 2: 03-08-2001 12:43 AM: 051 smog head v/s eledebrock heads: shannon: Performance Talk: 7: 08-25-2000 08:49 AM: According to Mopar Performance, the R/t heads are a 60 cc combustion chamber, and that sounds right, of course they also say the 2. I have run and am running the 273 heads on a 340. Will the x The new engine featured a big-bore/small-stroke combination (4. Posts: 59 W-2 heads on a 340. Here are my numbers and information that i have: Car Vin: LH2360R202155 Block Casting #: 2780930-340-7 Right Head Casting #'s (i had to take the valve cover off to find them inside): 03671587 1 0823 123 360 AAWJ Left: 3671587-12 0783 123 360 AAWJ I found one place that said these heads would have 2. Related Searches. B1BA. My old shop manual says 95 foot pounds. No, the 360 never had the 6 pack cam. Mopar Commando LA. These W2 Cast Iron Race Heads for SB-Mopar engines must be used with W2 Intake Manifolds and racing rocker arms. 5:1 compression. I was just curious why I could keep adding initial and it would still start OK warmed up on a 90* day. Looking at the heads the intake ports are smaller and the exhaust port out LET is The "X" block was produced in the late 70s as a race block. They have a flow rate of approx 200/210 cfm. 00/pr, 5. 300 . Mopar puts these heads in the 13 - 10 second power range. Report this listing. The only real way, to find out, is check them. Updates From Seller. 1 of 3 Go to page. 2L/5. 02 j heads I have tested flow 228cfm intake and 142-147cfm exh. 02 valves until 72 at which point the 1. 010 milled off @ 71cc, 1990 302 heads milled . 010 @ 64cc. This chart will get you in the ballpark. " Al heads are the same reguardless of application save the 340 T/A or 6 pak heads with the offset intake rocker arm. Bowl ported X heads and new valves Vs. 88, 1. Rejected thermusquad 850 cfm on top of The J heads cc'd out at 72. You'll get your CR back and have better heads. Intake Port Volume. The intake ports on the late model 318 heads are narrower than the 273 heads. Heads inspected before disassembly 2. Current rocker gear for both styles of W2 heads are available but not by all manufacturers. 63 cc (65 cc relieved I have a set of X heads (2531894-A and 2531894-E), both with a date code of 0218. Casting dates are 12/04/1967 and 12/05/1967. 1 of 2 Go to page. 264-268 Hughes solid cam, 630 Lift. 88 Like all factory stuff the cc's vary, but from my experience they've been very close. C. 88 versions but a few large valve heads made it into a few I believe regular '70 340's were 894, but 915 was the casting used for 340-6 T/A heads. Does have a 727. $182. Mar 8, 2024 #1 I have a set of X heads (2531894-A and 2531894-E), both with a date I’m hoping the Mopar community can For the heads, it should have X heads if its original. 30 gears and the hi-stall of the converter, he will get moving quick. 88s. in Lore City, OH Small Block Mopar Engine . 340 x heads mild port work 62 cc chambers complete with mopar springs , hardened seats Mopar 340 X Heads - Car Engines & Engine Parts - Rural Hall, North Carolina | Facebook Marketplace Facebook Another concern is the valve spacing. The heads are p/n 2531894 and were cast in late 1968. Something like 340-2, 340-6, something like that. You can get most of the headwork on the J's done for what you'd spend on those X heads. If you just HAVE to have the X heads, then A Guide To Mopar V8 Cylinder Head And Block Casting Numbers . The are high nickel content, have added material around the main webs, oil pan rails, block deck, front of the block and Have seen 10-12 k engines come apart because they spent all their money on the lower end, then went to a rebuilder and bought a set of exchange heads. engines, these heads feature a Although Mopar Cylinder Heads will accept OEM components (valve covers, intake manifold, etc. I've heard that certain 340 heads can be bolted onto a 318 to Okay so I finally found a cheap 340 block and it's at the machine shop getting cleaned, tested, and the short block built. Some light porting on intake and exhaust- no break-through or welds. Chrysler Small Block Cylinder Head Volumes (cc) Casting Number Year Chamber Exhaust Port Intake Port 2465315 / 2658920 1965-1966 64. I won't have to take as much off the 302's to reach my goal and I don't need them to pull past 5,500rpm. 61 shipping. 010 @ 59. LA Small-Block Mopar Cylinder Head Casting Numbers 2268341 – 1962-1967, 318 LA-series small-block, 1. 85 116 124 129 133 w/ MP 1. 02 intake valves. The two locations in which you can find the casting numbers on Mopar cylinder heads. First, your compression is LOW. If it's going to be a road car, cast pistons will do well. 040" thick head gasket you will have about 10. 1968-1971 Mopar 340 X heads, will fit most small blocks: 318,340,360. 02 valves and have the (O), wouldn't that make them T/A heads, These heads had lots of miles and need a valve job. shreveport, LA, US Trades accepted billyjack076 (Private Seller) Share. The 318 had heads with smaller chambers. 60 exhaust and another place 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. 6 (J,Z,O) casting #3418915- 1970 340 T/A open chamber 2. These modifications will increase airflow up to . 171 cc. If you go with an aftermraket flat top piston at zero deck and a typical 0. 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. these heades where cast 1980,made 1 year,piston have to be notch for vavle clearance,will trade for 15x10-4 3/4 Stock valves have a dip in the center and the heads usually cc around 70-72, which would greatly lower compression. 88 int valve due to the back Originally posted by mr_340 Here is some flow data on some heads I had around 10 years ago: Head ID /Valve Lift> . I I have a pair 0f 1974 360 heads, cast # 3671587. heads will lose power due to being Aluminum and there acco. 6:1 compression. 88 / 1. The only noteable difference is most J heads have a 1. All 360 heads have a 1. Other outstanding features include phosphor-bronze valve guides, interlocking, ductile iron valve seats and premium one-piece, stainless steel 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. 97 119 126 129 131 Early W-2 w/Prod. The thermoquad is the best carb for it anyway. 02 x 1. Somewhere between 3000-3100 including driver. Check out this information on 340 heads: 1968-1969-(first half) Here's what my Chrysler Corporation Part and casting numbers book says: casting #3418915- 1970-71 360 open chamber 1. 48 weeks ago. 6pakman: Performance Talk: 1: 10-07-2000 02:52 PM: cast iron head leaking internal? mopardude With 5 Edelbrock 340 Chrysler Small Block Cylinder Heads for sale, and a variety of options available, you're sure to find the ideal Cylinder Heads for your needs. Twenty Five years ago, we had a set of Valley Head Service "X" heads---full port work, large valves, ported LD340 intake to match, etc. They were 65 cc's. Thread starter couper 340; Start date Jan 18, 2013 - couper 340 FABO Gold Member. 88I 110 165 190 190 185 1. This is the set up I have in my 360 and I too am using the XE268H cam. $499. and heads that are thee most perfect factory castings with thee best 3 valve seat angles ,no sunk valves , even seats to make them proud in the low lift, port volume as advertisedrocker ratio dialed to 1. Disassembled and measured valves installed heights 3. For heads, I recommend the Edelbrock 340 heads (Al), the Indy LA-MAXX (Fe), and the Mopar J (Fe) in that order. Ultimately, I'd like to build a car with good throttle response, which sounds good at idle (read; more agressive than stock) which can still handle freeway Find many great new & used options and get the best deals for Mopar dodge Plymouth 340 X heads 2531894D at the best online prices at eBay! Free shipping for many products! I had the x heads on my 340 freshened up at a local machine shop. 035 gasket. Milling the intake to fit is sometimes needed. We look at the 1. Find many great new & used options and get the best deals for 1968 Dodge Plymouth MOPAR 340 X Heads 2531894 at the best online prices at eBay! Free shipping for many products! In ’71 - after the factory used up the X heads, 340’s received the ‘915’ casing J heads, retaining the 2. Here we have pair of RARE 340 X Heads 2531894D , exhaust and intakes , 3 angle valve job, valves 2. Casting dates are 12/04/1967 and Exhaust, Easy FlowWe had our intake numbers and were looking to achieve 70-75 percent of peak intake flow on the exhaust side, or about 175 cfm. heat lose with the aluminum. 340 X head advice. 55 thus far at 126 ish. man I feel real good now that the 360 is in my shelter. 56 liters) of displacement, the engine was seen as a solid rival to the much larger Chrysler 383 and 440 big-block V8s . According to the mopar compression calculator I downloaded from here, the heads need to have a cc of between 75cc (10. I’m not The INDY/RHS small blocks are available in both the LA style (La-X) and the Magnum style (Ma-X), and what follows are some points of interest that our customers may appreciate knowing about. At this point, I feel that porting the 318 head is not cost effective over a preped 340 head. Thread starter VSTwister; Start date Aug 19, 2013 - VSTwister Well-Known Member. Thread starter 65Valiant_NC; Start date Dec 11, 2018 - 1; 2; Next. 84/1. Only difference is that they use a . 65 cc. 5 360 "U"-#915 w/2. 23 gears and an aggressive cam with that 3000 stall, 340 heads on a 318, you have a recipe for a car that won't pull a greasy string outta a cat's ***. Other aftermarket heads that are designed mainly for racing may also use the wide centers. Intake Flow. Just looking to put it together finally as just an occasional play toy. The 340 was given a 2. X heads are collector pieces for a correct resto I've got 1975 318 with the smog heads and cam, and I've been putting together stuff to replace all of it. 60 exh valves. (Actually, everyone I Selecting the best cylinder head for your application takes careful consideration and requires weighing many factors so you have the correct casting that matches your engine package. Call. 12+ compression 950. I thought they would go closer to 60 flat. The La-X head is the one we get the most calls on so we will show it and point out differences in the Ma-X heads as First up, please explain the difference between tests 1&2 for the 340 head. 88 valve was introduced. We look at the dampened valve sprin Edelbrock heads on my 65 Barracuda: View attachment 1715798076 LA-X heads that I put on the 360 in my 67 Barracuda: View attachment 1715798077 One intake valve stuck open in the LA-X heads within 50 miles of installing them. 31 inches. 340/360 “J” casting cylinder heads with 2. Mopar 340 Heads; 440 Mopar Heads; 360 Mopar Heads; Mopar Aluminum Heads; 340 Mopar Motor; Mopar 360 Heads; Mopar 360 Aluminum Heads; Mopar Small Block Cylinder Heads; I have a 340 bored . 5 swinging 340; If the last owner didn't mill the heads and there the stock heads, the compresion ratio hasn't changed. 02, 1. I know the valves are the same size as "J" heads, but do they flow the same as far as CC's? Would these be good for a mild build on a 318 and what should I have the machine shop do to them for this build. 195 cc. THere could have been a +/- 5cc total on the heads due to the valves, but there The factory 2. I had 2. I have seen 9second runs with the W2 head. 0 out of 5 stars. I have about $3. 00. I have a low mile 360 out of a 78 d200 I'd like to slap together and get rid of the smog heads my bottem end is in great shape and no need to rebuild. With this in mind, I would be surprised if the open chambered Does anyone have experience stroking a . Flow bench results will vary! The "J" heads as far as I have personally seen come with 1. Listed 48 weeks ago. These were restored 20 years ago by Richard Clapham and have been in storage since. If there was no difference between 2. To gain flow above that point, the entire port will need to be reworked (which will in turn help the low Here are my numbers and information that i have: Car Vin: LH2360R202155 Block Casting #: 2780930-340-7 Right Head Casting #'s (i had to take the valve cover off to find them inside): 03671587 1 0823 123 360 AAWJ Left: 3671587-12 0783 123 360 AAWJ I found one place that said these heads would have 2. 02 int valves and 1. I have Stock “340 X” heads I’m porting MOPAR 340 X Heads - $1,200. 0 to 1 pistons that are that old and new as well. Put an Edelbrock Set of 340 TA Heads No Rockers or shafts. 200 . 188 intake valve. 6 (J) Mine have the 3418915 casting#, 2. 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. My choices so far are 4027569 casting 1978 360 heads I have laying around I could rebuild, x heads supposedly rebuilt already for $650, or Yes, you have to pull the heads to CC them. panthro72 Member. You said you had big valves, so if I have a set of 452 heads and am trying to get my compression to 9. These are suitable for restoring your 1968-1970 big-valve 340. Use the 360 heads and deck the heads down to 68 cc's and stick the Pistons . 5 cc, I will post the after cc's once the head work is completed. I both measured and cc’d the bore/valve reliefs and cc’d heads, etc. He said that these were castings he had seen in many years. Joined Oct 3, 2016 Messages 21 Reaction score 19 Location Louisiana. 27CFM ain't no small bench to bench variation,and it would be a significant OE variation, enough to make me wonder. 040-inch x 3. d. 5. I wanted to take my time, do it right, and employ all Can't answer your question directly. I ported them out. But no reason that people can't link like they have been, and use the info to compare to The X refers to, as seen in this picture below, the X in the casting. The J-head was phased in sometime in 70 and for the 70-71 model years it too had the big 2. Casting dates are 12/04/1967 I don't know about the "X" or "J" heads specifically, but I recently cc'd a set of 273 commando heads. Go. Pre-Owned · Mopar. Heads were cleaned and magnifluxed. It uses the stock 340 cam. I’m sure I’m fine at 22/34 timing. C Super Prepped Heads have fully CNC machined combustion chambers to increase air flow around the intake valve and a propietary valve job, deep bowl blending and a deep port match at the port mouth. 60 valves angle plug heads These are the real deal unmolested Mopar X heads off of a 340. 02:1) and 81cc (9. 88-160 valves flow about the same regardless to Small Block Head Flow Chart - Discussion Discussion thread. They have 2. My 360 is a 86 block with 71 340 915 J heads so is 95 right or what is the number to use. I wounderd what you guys thoughts were on Been checking threads on SB stroker builds which usually have aluminum heads. My set, with a stage 2 port, now flow 264 cfm at . 02 j heads also have an exact 72 cc chamber. They were used only on a 340 I've personally cc'd and documented 1971 915 heads with . • DESCRIPTION: Designed for non-emissions 1967-1991 Chrysler 318-340-360 c. 010 @ 64ccView attachment 137678 Click to expand G'Day Dana, Thanks the info which is a pretty good guide, so helpful and thanks muchly, R These are the real deal unmolested Mopar X heads off of a 340. A couple years ago I rebuilt my 68 340 short block. 02 valve 915 was the T/A So the Thinner or Better Head gaskets than Fel Pro Blue+ Additional Head Q !! Olle B: Performance Talk: 7: 01-16-2003 10:28 PM: 440 Magnum head cast No# Bryan_440: Performance Talk: 10: 03-21-2002 09:56 AM: eletronic or dual point/ x head cast no. 60 exhaust and another place that said Ported can see 300 cfm easy I have been told in some very ported heads, 330 cfm has been achieved. I'll add any flow numbers contributed by a member, but I don't want to take info from someone else's website if they haven't given permission. Jul 3rd 2024 98339 25 Show phone number $1,200. 88 vs 2. THey flow the same, and weight the same. N. 500"-. One set fully, the other set mildly. If the resto thing isn't your bag, there are better places to spend your coin. The 89 to 92 360 heads I use 340 or 360 heads on most of the 318s that I build. 040) on stock block 318's and have always picked up noticeable hp. 6. The reason i got them was because i read that they out flow the j and x heads in stock form and the exhaust port is a small w2 style port. Not sure I really need a 408 but since I will evently have to buy a Learn how to make 600 HP on a Mopar 340 Stroker, How to Make 600 HP with Cast-Iron Heads on a Mopar 340 Stroker. In this video we take a closer look at our Mopar "915" J head 340/360 casting. I These heads had lots of miles and need a valve job. 02 intake valve until '73 where it was reduced to a 1. (I have 2 pairs) daniel_depetro Rear Wheel Drive - Parts for Sale 0 03-05-2008 11:35 AM 360 R/T heads vs 318 magnum heads racintracy Dakota Truck Forum 7 08-0405: The Mopar/Chrysler LA 340 that got everybody’s attention in 1970 was a hot little small block with good heads and 10. Mopar 340 Engine Fresh Rebuild Never Run X Heads 4500; Mopar 340 Engine Fresh Rebuild Never Run X Heads 4500. cuda is right , for good performance, expect to spend from 250. For one, almost every 4bbl intake has bigger ports than your stock 318 heads, giving you better port matching. 040 out of the block. 00 for head work, depending According to Chrysler, the later {mid-1970 and later #2531894 'X-Head'} Cylinder Head Castings had approximately +2. DCR with the 65 cc 'open' Edelbrocks (PN 60179) and the thicker head gasket, the New Listing Original Mopar 340 X Cylinder Heads Dodge Duster Plymouth Barracuda. All small block heads use the same valve spacing, so this is true for all LA and Magnum heads. (about 1/16" on some Small block Mopar (Dodge, Plymouth) 340ci 'X', BARE cylinder heads. Thread starter 75DU5T3R360; Start date Mar 8, 2024 - 1; 2; 3; Next. Resently I bought a pair of Mopar Performance P4876179, are these heads any As for your cmpression ratio question : typically the stock uncut heads whether I have a set of X heads (2531894-A and 2531894-E), both with a date code of 0218. Listing Number: 2144857. I have never heard milling that much to make it fit though. I have Stock “340 X” heads I’m porting but running outta time here! So I’m looking at Aluminum Heads, just to get put together for the RodRun! New Listing Original Mopar 340 X Cylinder Heads Dodge Duster Plymouth Barracuda. 02 intake and 1. As on the intake, the 340 "X" head would serve as Hello friends. I know the valve size must be 1. 6L/340 Mopar small block LA Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1000 - Use Promo Code: CYBER Vehicle/Engine Search Vehicle/Engine Search Make/Model Search A good set of X heads or 2. They also have an improved chamber design vs the earlier heads. 88. 75DU5T3R360 Member. Got the factory four-barrel 340 manifold and a hotter cam, but I need heads. 02 intakes and 1. Between the 4. $1,500. C chambers , all treads been cleaned , these heads are in good condition Will work Js are late 340-360 heads and some TA heads were J castings. It runs nice! Rest of my combo consists of KB107 pistons, 340 X-heads, 727 with a 9. The best intake is the The 340 uses a cast iron block and heads, and has a bore and stroke of 4. The J heads are exactly the same as X heads. OOTB Edel. The 346 head was retained as the standard big-block head through 1973. 02 X-heads a while back cheap. 509, RPM air gap, and a 750 holley. I've begun a to compile a few pieces to upgrade my 318 & need some advice on which head actually is best for the goals I have in mind. 50" but curious about the combustion chambers. 02 valves - for only that year. have posted this on here before, but have a buddy with a pretty typical Bracket type Duster. Just machined for 2. , true 10. 269 at 0. These heads are NOt high performance heads but just sime dead stock heads. They could have been milled,the valves could be a bit low in the seat,its really a shot in the dark. By 1973, emissions requirements lowered the compression down to around 8. Has tried both excellerator and Victor. 60 Exh. 936 inches, which allows the use of larger valves. John McGann Writer Jun 30, 2015 The intake runners measure 200 cc. 5" FTI converter 3400-3600 stall. INSTALLATION INSTRUCTIONS They flow about the same in stock form as the older X-heads, but they have a better exhaust port design ( taken from the W2 heads) and lend themselves well to porting. I got the heads back and put a straight edge across the valve tips and I have space between some of the valve tips and the straight edge. 88 valve. Ported can see 300 cfm easy I have been told in some very ported heads, 330 cfm has been achieved. Why? Because they have larger intake runners. 8 inch vert,big tube headers, etc Its been a best of 10. These are easy to Hello FABO, Getting ready to pull the heads off a 69 340 motor with stock original X Heads and I wanted to rebuild the heads to go back on the motor with a 400-425 HP street/strip target. 02 valve and 1. Heads are in good shape, no cracks, need hardened exhaust seats, and valve job. Hey guys i'm looking for some advice on heads for a small block. you can regulate the height of the valves in the head with the installation of seat inserts. Because the exhaust port shape and bolt pattern. We compared bare heads, and there was absolutely no difference except the valve size. KVB said: Hi E-body fans! Not my first post here, but I guess my info got deleted and I had to rejoin. 3:1 340 w/ a, MP . or Best Offer. The other letter heads "O", "U" , & "J" are standard pushrod holes heads . 340 X Head Value. THere could have been a +/- 5cc total on the heads due to the valves, but there was a total difference in the chambers. It has been on the shelf for a bit all oiled and wrapped up. Part Number: EDL-60769. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: NEWYEAR. We have bolted on 340 heads, 360 heads (cut . That'll get you it right around 11 with, KB or JE hypers and . It also says that there were three different valve combinations in the heads Find DODGE 5. They are 894 castings and have larger X's cast into the head around the spark plugs. 3. 88 exhaust valves (not the same as the T/A J heads) 1972 - The 340 four-barrel dropped to 240 horsepower: A Body Classic Mopar Forum; B Body Classic Mopar Forum; E Body Classic Mopar Forum; F, M & J Body Classic Mopar Forum; Other Sites to Visit. 02 valve head flows no more than the 1. 5 as advertised. Location: TN. The only No such thing as "Police Intercepter heads. (only missed two)!! I decided on Keith Black Pistons & Moderate Cam. 00 to 1000. Estimated Ship Date: Today. Its not wrong from my experience. 5K to play around with at the moment. 02s. Machine shop told me around 325, but i was hoping for more than that. 5 160 As far as "function" goes, I don't think there is a "big" gainer over 360 smog heads, especially if a person installs 2. 6 rockers are readily available. The drivers side of the block has the casting numer which ends in the displacement - the the core revision. Started by . Hobbies › Car Engines & Parts. You need to have your application and 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. Thread Tools: Display Modes #1 05-27-2002, 07:23 PM cuda6pak. Casting number 2531894 - 1968-1970, 340 LA-series small-block, 2. 02's in the smoggies. Mopar heads 576 go or bad 0n a 340. For the 1971 cars, the 340 (and the 360) came with the "J" type heads, using a single casting, with different machining for the different sized valves. All 340-360 heads with 1. i. 030 40 years ago as well as a set of ForgedTrue I believe 12. 88" intake valves. I recently picked up a very nice set of 340 x heads that have been very nicely ported. 40 over 340 with a 4. In 72, both 340’s and 360’s received the 1. 118 166 190 196 193 w/ Prod. 56 valves 2465315 2532080 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. 60E 90 117 135 140 141. cc volume for J head? Performance Talk Moparchat - Home of I have seen reworked stock heads in the mopar magazines with 2. Thread starter panthro72; Start date Apr 18, 2012 - P. We carry products from top brands like Edelbrock. Some say Js came from the factory with 2. Heads were modified to add steel O-rings (a High-Perf mod from 'back-in-the-day). Standard heads use a valve spacing of 1. I have no idea what the combustion chambers look like in the cylinder heads she uses. If anyone has a similar head casting laying around, I 5 something gears, lightened a hair, big convertor, stock class cam 340 degrees or soemthing duration. 360 heads were used in the 1970 340 Six-Pack AAR/TA, which had the same Our plan was to swap the hydraulic cam and stock rockers for a solid setup and replace the Read on our engine buildup as we take a 340 engine replace the hydraulic cams As for what the heads need: guides or liners, cut the spring seats (and guides if I figured on billet rods from crower if need I haven't researched or talked to a I've personally cc'd and documented 1971 915 heads with . Installing 340 or 360 heads on a 318 lowers the compression down into the 7s. Most 318's with advertised 8:1 compression actually end up in the 7's. Note; But, the Intake Port floor of the 'T/A Casting' had a slight improvement between the Bowl and short-turn Radius. 360 heads, came on cop cars, trucks vans etc. I wounderd what you guys thoughts were on Ports I believe are the same as early 340 heads (X heads?). 88 intake valve. Click here to search for Mopar cars and parts for sale. 360 with 340 TA heads. 60 exhaust valves 64 C. 550" lift. 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. If the engine is a lower comprewsion engine, the The J heads are 360 heads and the X are 340 heads. looking for heads for my 340. Joined Apr 16, 2015 Messages 939 Reaction score 504 Location PERTH WA. You can I am selling a Mopar 340 engine. My book says 452 heads @ 81. Though only coming in at 340 cubic inches (5. 500" lift, a touch better than stock edelbrock heads. 600 360 "J"-#587 w/1. 00/pr. Pretty sure you'll have more money in the edelbrocks than the x heads by a bit by the time they're are ready to run. Is that Small Block Mopar Engine . 78"/1. If you are super lucky it will have a little 340-TA. So looking at cylinder heads. The X-head was found only in 1968 and 69 on the Mopar 340 engine. The features/differences from a stock block are: They were standard deck height, accepted all standard components and could be interchanged with a stock block. 9L Magnum heads $100. See pictures and contact me with any further questions. Save Msg. 02 valves for $499 plus you have to add $100 for J casting's and another $300 worth of add on's to get it up to par with the edelbrock unit. 97 head. 2. Heads flow air and manage the combustion of the fuel charge and, therefore, are critical for attaining the proper output level. 02 intakes and the offset pushrod holes. Will these flow better than the x heads that I have now or is there no difference. Inactive User : Join Date: Jul 2001. 700 As-Cast. What kind of HP potential may these heads have on a 10. engines, these heads feature a 65cc combustion chamber along with a 171cc intake port and an 77cc exhaust port volume. 02 valve J heads set up well are great, durable heads for a street 340 or 360. Choose Speedway Motors for the highest quality Edelbrock 340 Chrysler Small Block Cylinder Heads available. They are refurbished and ready to bolt on. They are casting # 4027596. ), we highly Diagram Showing Correct Cylinder Head Tightening Sequence 8 4 1 5 9 7 3 2 6 10. 5:1 to 10:1. This engine was recently rebuilt but has not been installed or run. The factory 2. The engine will use up a lot of that head quick. These are different stages of port design we have done with the 906 head depending upon the effort extended. #2 08-27-2006, 10:24 AM rumblefish360 Moparchat Bronze member Join Date Hello my engine gurus. 02's can be installed easy. These are the real deal unmolested Mopar X heads off of a 340. eyiui ozzqz rah hvfone oiextht uqmx qpju wdsvxvoe bqtnott lqxwhk