Brent I think 7300 -7500 will be the absolute max. All my rocker gear currently fits under 1st generation valve covers, I want to keep it that way, for the sake of originality.
Edit: I have my fingers crossed on this but today 2 different Camshaft sources of which I inquired, after running the specs through their engine programs are indicating that the engine with the specs submitted should be capable of between 432 HP at 6800 RPM or 452 HP at 7250. I will be tickled to death if these numbers are remotely close. They may be optomistic but if they are even close it will widen my smile
Brent: Currently using Comp Cams 1 piece with .080 wall?