RARE INTAKE MANIFOLD

pishta said

@Oldmanmopar How does the intake angle change? Aren't the decks just cut -.100 (eg) square toward the crank centerline? Seems they would just sink in the same plane and keep the original angle, just having them closer physically. So your spacers would be the same thickness but your china wall gap would be huge...? Set us straight.

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When you deck the block you are shrinking the angle surface on the bottom port side of head. Therefore the intake can't sit down where it needs to be. It's simple geometry. IMO The correct way is to the cut the intake port side of head to get the correct angle and you can run any stock manifold with-out issue or leaking oil or sucking oil in the cylinder. If it's cut really hard there is more to be done as the front and back rails become an issue also.. Hope that makes sense...