Why plane your intakes w/ milled heads???

never cut an intake except for clean-up purposes. and than just enough to clean up any imperfections. if you cut the cylinder head surface you than cut the intake surface of the head. that way the heads and the intake minafold can be swapped around to different engines without causing problems. cutting the intake surface of the head creates the same geometry as cutting the intake manifold, so why mess up a good set of heads or intake. Al