[supergonzo]

For those non Pontiac people, basically any round port exhaust head Pontiac motor has real good potential. RAII/RAIV/RAV/455HO/455SD

"Running low 12's with a 9.5 455, is a piece of cake and you get to use pump gas." I agree no problem.

Don't cut the heads though, get the right pistons instead. Any HYD cam with 240 degrees duration and under .520 lift and you'll have a fast and reliable street cleaner, while enjoying 60 degree air temps inside the car in summer!