head milling
See, here is where that doesn't seem right to me.
Looking at the pic below, the intake side of the head leans back toward the head side of that mating surface. Moving the head down shouldn't result in a narrower valley, but it will move the intake port down, which would require all three lower surfaces on the intake manifold to be cut to make the intake ports line up
Cutting the bottom of the intake manifold then would require the intake side of the manifold to be cut to make the intake sit lower to match up with the new "lower" location of the port side of the head.
See, here is where that doesn't seem right to me.
Looking at the pic below, the intake side of the head leans back toward the head side of that mating surface. Moving the head down shouldn't result in a narrower valley, but it will move the intake port down, which would require all three lower surfaces on the intake manifold to be cut to make the intake ports line up
Cutting the bottom of the intake manifold then would require the intake side of the manifold to be cut to make the intake sit lower to match up with the new "lower" location of the port side of the head.