Today, dollar for dollar, is the 318 faster than the 340 ???

Jadaharabi said

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Please tell me where I can find more information on the 383 Siamese block.
I have never heard of such an animal.
I do know that Indy and mother Mopar had some Siamese cylinder Hemi and raise blocks. But as for a Siamese 383 block never heard of it.
I do know there were some raised block 383s back in the sixties but they're kind of rare.

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Correct the chryslers used 383rb early on. If memory serves correct the 59-61 or 62 factory hi-po 383 dodge and plymouth are siamese blocks the dual quad versions. I had a engine guru friend that built engines for dealerships back in the 60's and 70's that clued me in. We had one in the junkyard but I had to have a 452 stroker . So we went through and found a good 400 block. And he bought/traded for that 383 block. Hard to find info on them. Most people just assume all 383 blocks are the same