It fits. I had a 66 with a 454 and a Art Carr tubro 400 with a Gearvendor OD. I would use the 427 tall block and stroke it to 509in. The motor made a lot of heat under the hood. Put two 3 core radiators together to keep it cool.
1940 Chevy 1 1/2 ton, 1959 Chevy 1/2 ton, 1966 Chevy C20.
I can explain it to you but I can't help you understand it.
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