From what i know, assuming the ports are "big" so would the jets and chokes be on the carbies, therefore putting the head manifold and carbs in a top end power section. Possibly (without knowing specs) if the engine is a street engine it could flood the motor down low. However with a different cam it may smooth things out a bit and pickup some power down low.... but again depending on the cam you may be looking at a top end runner ie. over 5 grand because of highend air fuel flow.