Im getting a set of fully ported iron heads for a real good price. Whats the differences between them and aluminum? Besides the slightly bigger CC. What other things would I have to worry about when swapping these heads? All the provisions have been done for the larger cam, nice flow numbers. Im also going to be swapping to the lpe superram intake manifold system when I put these heads on. I have an lpe cam right now 213/219 cam right now installed. So im trying to match everything to that cam. Heads flow perfectly for the cam, and when contacting lpe about the intake they said thats the perfect cam for it.