because that is a waste of space. People put a 20R head on a 22R block for the better flow of the head, and the increased bore of the block. Doing it the other way around is backwards if you are looking for power. You'd end up with an EFI engine, but one with a small bore, and a head that doesn't flow very well.
true but isn't that the ultimate goal here. He wants an EFI
