How much would it cost to build a 302 with a 12 port head. all new engine parts maybe some carbs or webers. I want to drive it on the street. I have talked to some diehard inliners at bonneville that tell me i am crazy for wanting a 12 port 6 for the road as a daily driver.is this true. I want to use a t-5 and a older hallibrand quickchange rear end. I don't build motors my dad usualy builds mine. So i don't know alot about motors.