Ideally the intake should be machined to match the machining of the head surface so they will match. The intake bolts would then align properly and gasket sealing would be much happier.
Im thinking Prussian blue no gasket and see how the intake lines up with heads
Im thinking of Sidewinder heads, talked to Todd? and I liked the guy, he will build heads according to my engine and no taking them to a shop to be gone over......Only problem is he doesn't have heads yet in stock, maybe by years end.....