If you're going to 4 bolt it, go with the splayed caps. Makes a super stout bottom end. The John Kasse designed Super Cobra Jet heads are very good, also ran a set of Trick Flow's A-460 heads, but with Trick Flows, the power band is a bit higher in the RPM range and more of a track only head... For street use, the Edelbrock Performer RPM heads are probably just fine.... Oh yeah, and make sure the rest of the chassis is up to handling a bunch of extra weight and torque!!!!