340 buildups
Solidly built 340 short, good Magnum heads (converted to std bolt pattern to run any intake), and the Comp XE262 would be my idea. The Magnums run 1.6 rockers, so it would be easier to overcam a street engine with them. Prob run around $3400 around here (CT) if you have the cores. I think it's a great idea, but keep in mind, those heads are made for a good controlled burn, and low speed torque. They will give up a little on the high end, and I would keep a shift point of 5500 or lower with them.