I would guess 12-15K would get you there. I had Ryan J do my short block and heads, He said it should make around 580 from 408 inches, 11 to 1 comp. He's built them into the 480 CI range.


70 Dart Swinger, 2850 lbs
SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133