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Just the point I'd like to make about the bore of the 383 being so small. It's 4 and 1/4 in as in 4.250 which is the same as a 396 Chevy and a 426 wedge or 426 Hemi. I don't see where 4 and 1/4 in is a small-bore
396 chevy bore is 4.094. 427 chevy is 4.25 . Supposedly there are a few 396 blocks that can go .130 over. I havent found one.
And, a 383 mopar, with a .060 overbore and a 4.25 crank, is the exact same bore and stroke as the highly regarded 496" bbc.
