I'm doing basically the same 383 build as the OP, same 516 heads, 2.14 intakes, 1.81 ex. I've cc'd the combustion chambers numerous times, and I keep coming up with 76-77 cc's. Speed Pro 2315 flat tops @ .030 over. Crower solid flat tappet cam-advertised lift .529,
[email protected] I. 240 deg, E...