Not really unless you are after high horse power numbers. I think it would be more cost effective to just get a ported intake manifold and call it good. If you are pulling the motor as well, I would maybe look at a cam (I have heard great things about a mild cam) but either way since you are pulling the heads, I would look at upgraded valve springs and larger push rods and depending how many miles are on it, I would also just put in new lifters as well. JMO and hope it helps.