Quote: If the intake won't sit down for the bolt holes to line up, check without the end seal gaskets. On my 360 the heads and block were milled to where I just used some RTV for the end seals. If the intake is still to high on the heads, you will have to mill the intake (or heads on the intake side.) Enlarging the bolt holes is not a good idea, bolted on that way the cylinder head intake ports and the intake manifold ports are going to be out of alignment.
and very well could be sucking oil and air/vac into the ports causeing it to smoke and run poorly.
