A lot will depend on what heads you are going to run. Will they be 23, 18,
15 degree? Now I have a 23 degree 434 that is 721hp. It has Brodix Track 1 CNC 227 heads, HVH intake, 15:1 compression, and a 930 cfm Holley, Dart Little M block & Comp Cams cam.
TS1955