Head and pistons

[blue69runner]

Put a half dome piston in the 383 to get more compression. 440 cam. New connecting rod's. Yes always rebuild the bottom end also. Now I will get around 400 hp out of the old 383. With a 650 Holley carb.

 

[PRHeads]

Frankly, the OP should be having this same conversation with whatever machine shop he ends up using.