440 Intake for Full Race?? - Our Lil Red Express

I tend to disagree with them on two things: the port window, for the rpm and cam you have is fine. Smaller and faster is better and I don't think the work (and expense) is worth the result. Upgrade the heads if you want to make a feelable improvement. Second, the 4500 adaptor. I do think some plenum volume will be good for it, and the adaptor adds that and allows the 4500 series carbs to bolt on. But, that can also be played with later with bolt ons.