Aluminum Intakes dont seal on X heads

Generally a intake will fit without machining up to .020-.025, so if you cut .030 you could have .055 off the deck surface and the manifold will still fit. If it's angle milled then it drops to less than .030 reguardless of the amount. I have cut heads for some .050 flat and then .050 angle milled and had a total of .030-.040 off the intake side and the manifold worked and fit just fine.

But I agree that at this point that it would be alot of work but to me is the only way to do it right.