Thanks for the input. I'm new to hot rodding engines...but I've been reading about this stuff since I was a kid.

I guess I'll leave the cam alone (especially since the engine is back in the car now).

Maybe rather than cam, I should port the exhaust on the 670 heads since I'm running more than .400 lift. Any comments on this?

I might try a bigger carb, but the CFM calculations assuming 90% volumetric efficiency tell me 600CFM is enough. So, I'm a little confused about this, but I don't know of anybody running a carb that small on a 400 plus cube motor.

The car runs pretty good now, so maybe I should just leave it alone.