Originally Posted by rapedape
OK GUYS IM BACK !! THANKS FOR THE ADVICES. JUST PURCHASED A ROTATING WITH A FORGED CRANK EAGLES WITH EAGLES RODS AND JE FORGED PISTONS. AS FOR AS THE TOP END I WAS THINKING GOING WITH SOME AFTERMARKET ALUM HEADS. I WAS THINKING EITHER AFR OR PRO 1'S WITH A BUMP STICK WITHIN THE 550-600 LIFT RANGE WITH A DUAL PLANE INTAKE AND A 800-950 RANGE CFM CARB SHOULD I BUY THE HEADS BARE OR ASSEMBLED? THE COMPRESSION SHOULD BE AROUND 10-10.5 : 1 FOR PUMP GAS WHAT KIND OF POWER TORQUE SHOULD I HAVE ??
I'd go with a bigger bump stick, personally. A 550-600 would be good in a 454, but with nearly another 50 CID, it needs a bit more. Something between .625-.650 and around 240-250 @ .050 would be my thoughts. You would be best, however, to contact Bullet Cams and have them recommend something appropriate.
http://www.bulletcams.com/
Bullet Cams is all the guys from Lunati, and they made some bad ass cams. I think their R35 profile (roller) would work awesome in that motor.
If you're going to keep the RPM's at or below 6500, go with a 265-275cc oval port.
If you want to wind it up, 320-325cc rectangle port.
With any set of assembled heads you buy, plan on a valve job and having the spring heights set correctly. In mass production, both of those components usually don't get the greatest attention to detail.
Ya really should have gotten the cam before the pistons. At this point, you don't know how much lift the pistons can take, do you?
Power wise... 550-600 should be attainable.