Could be a cast crank 383 but because it is a 4-speed it is probably still a forged crank. I have a 71 383 laying around and it has a cast crank, but it was an automatic car and it was 71 only as 72 went to the 400. Pretty rare car for sure! up

Last edited by Rhinodart; 10/29/23 11:25 PM.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

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A-Body's RULE!