Mopar 346 heads. Still, they are good if you have nothing and need to get down the road. May ...

Mopar 346 heads. Still, they are good if you have nothing and need to get down the road. May 17, 2014 · Other than printing the wrong year and casting number, it was clear that this was a smog head to be avoided. In stock form not much difference in flow from any open chambered heads. It is said that the 346 (71-73)/902 (74)/975 (75)/452 (76-78) heads are easier for a novice to port because of the flatter intake port. 450 lift range. 005 and I had hardened exhaust valve seats installed. Jul 21, 2024 · From research on this forum, I've learned the difference between 906 and 452 heads is hardened valve seats and I believe there was 2 cc's less volume on the 906 heads. No supporting information was provided, but in the minds of Mopar enthu-siasts, the written words have long been accepted as gospel. They had "semi" induction hardened seats I believe. My question is, I’ve done quite a bit of research on the forum but I have access to a set of 68 383 HP 906 and a later set of 452. May 3, 2013 · Other than printing the wrong year and casting number, it was clear that this was a smog head to be avoided. Feb 15, 2025 · Big Block Mopar HP 346 Cylinder Heads 383-440 Chrysler Dodge Plymouth O Original Mopar (2564) May 2, 2012 · Years ago I went trhu several sets of the "hardened seat" heads such as the 346. I had a 3 angle valve job performed. My 1st big block, so Im not sure what would be a good combo to make this thing go like hell. Jan 1, 1998 · Read the tech article named, Cylinder Heads Part I, brought to you by the experts at Mopar Muscle Magazine. Sep 12, 2010 · 452's and 346's flow just as well as 906's. Thanks for any help. I am assuming the slightly smaller numbers for the 516 is due to the small exhaust valve? By the way, the MP templates were mentioned. . ) Well, that's quite interesting. They won't kill the build, but if you have to redo a set of heads and happen to have a set of 906's, or can get a set easily, I'd use the 906's. 00 delivery Check the item description to confirm this fits your vehicle May 15, 2014 · Just picked up a pair of 346 Heads, need to be redone but in great shape, no rust or damaged threads. 00 + $135. I also think that the "346" are open chamber just like the stock heads on my 69 383 4bbl. Runs great, but want to bump the compression up and port the heads mabe. May 15, 2024 · Pair 1972 OEM Original Big Block Bare 346 Heads Chrysler Dodge Plymouth 400-440 May 4, 2024 · Pair 1972 OEM Original Big Block Bare 346 Heads Chrysler Dodge Plymouth 400-440 $225. A skilled porter can get more out of a 906 but that rules me (and most others)out. Another question I have is should I use the edelbrock intake bolts with the performer rpm Apr 1, 2012 · Just picked up a 30K mile 1/10/73 440 w forged crank and 346 heads. 00 delivery 1973 400 440 Original Big Block Mopar 213 Cylinder Heads Chrysler Dodge Plymouth $275. Pros of buying a 1971 Mopar 346 CID V8 engine head cylinder for a 1972 Dodge Plymouth 440: 1. 00 + $145. 3. Will these work ok on my chrysler 383 with an upgraded cam with a . Want to do minor port match and clean up. Jan 8, 2012 · IIRC the 346 heads were used from 71-73. 74 valves Apr 1, 2019 · Picked up a 71 HP 383 with stock 346 heads but they were pretty roached. They were surfaced . The exhaust valves were replaced with new 1. Which would be best for a hot street setup Mar 24, 2014 · The 346 and 452 heads seem to share the same intake port design so really not much difference unless you count the factory hard seats on the 452's. Had five or six of them that were cracked between the exhaust and intake valves. Jul 17, 2025 · 383-440 OEM Original Big Block Mopar 906 Cylinder Heads Chrysler Dodge Plymouth Jan 12, 2013 · The port on the 516, 346 and 452 are all of the flat intake floor design, which are not as good as the 915 and 906. Sep 13, 2021 · The 346 heads come with hardened seats, so you are ahead of the game in that respect. Very little difference (at least in the normal under . 2. You might want to consider doing a bowl job on the 346 heads and investing in a set of headers. Availability: The 346 CID V8 engine was a popular option in Mopar vehicles, which means parts are widely available and relatively easy to find. Apr 6, 2017 · I think that the "346" are the same exhaust ports as "452" or "902", but different intake ports. You can do a good basic valve job and pocket port and make plenty enough power to burn your tires down to the rims. Oct 15, 2016 · I have a fresh set of Big Block Mopar 346 heads for sale. Jan 16, 2014 · The difference in the port between the 906 and the 346/452 is the intake, with the later heads reverting back to a flat floor like the old 516's. 480 lift: it's a comp cams 268H XE. They were blasted and magnafluxed to ensure they were in good condition. Affordability: Older engine parts can be more cost-effective than buying a new or remanufactured engine. fxa bbv pim zjo cge kyl lvf zkt aox mey fxe iyf skh uth jzg