![]() 07/24/2018 at 18:35 • Filed to: None | ![]() | ![]() |
licence plate for scale.
![]() 07/24/2018 at 18:57 |
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318?......383?.......
![]() 07/24/2018 at 19:07 |
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I like the description found in an article that describes how to mod them https://www.hotrod.com/articles/mopp-0109-chryslers-poly-head-engine/
Unfortunately, since the ’60s, the poly engine line has been “dissed” as little more than scrap metal, something to stick behind the garage since it was too heavy to tote away.
![]() 07/24/2018 at 20:06 |
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the most common displacement for the A Engine is 318 cubic inches. The A Engine is not the same 318 Chrysler used up through the ‘90s; this is an older architecture which has canted valves and “polyspheric” combustion chambers, kind of like the Ford 351 Cleveland.
The A Engine was dropped in 1967 and replaced with the LA (“light A”) series, which is the engine family (273/318/340/360) you’re familiar with that stayed in production until 2000-something. the LA Engine had conventional inline valves and wedge chambers.
the 383 was a different engine family, the big-block B Engine family. The 413/426/440 was also in the B engine family but with a taller deck, thus called RB (for “Raised B.”)
![]() 07/24/2018 at 21:21 |
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So this one of those B blocks? Bore it out to 440 baby! Big cam! Headers! Nitrous! Hold my beer!
![]() 07/24/2018 at 21:26 |
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uh, did you read anything I wrote? it’s an A engine.
![]() 07/24/2018 at 21:48 |
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there we go........ i have seen the 318 polysphere, in just about EVERYTHING right around 1963-ish. everything from sportsfurys to the large dump trucks. and they are sure wide......
yeah, the LA have the distributors in the back like a chevy, and the B blocks have the distributors in the front, like the fords......
good heads up there, to keep things straight......
![]() 07/24/2018 at 22:15 |
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weeeeellll... the B/RB has the distributor up front, but it’s slanted like the Buick/Cadillac engines. ‘cept it’s slanted on the passenger side, opposite of the Buick/Caddy.
complicating things of course is the fact that Chrysler kept producing the AMC 360 V8 until 1991, which had the front-mounted distributor slanted towards the driver’s side like the aforementioned GM engines.
![]() 07/24/2018 at 22:25 |
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I have aquired three of these beasts over the years, too bad performance parts are non-existent. Intake choice is the big problem in my opinion. I’ve heard that some of the early hemi parts will fit, but that stuff is getting rare and expensive.
![]() 07/25/2018 at 09:29 |
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Long day man, long day....