I am using an 86 pass car block the B303 cam and some speed pro hypers with two reliefs and 1.7rrockers. I ported the GT40P heads and polished the valves cc and exhaust. It has a lumpy idle for the intimidation factor. Pumped aod with 4.11's in a 64 Fairlane. scoots pretty good down here in TacoMa.