Intake oil leak and 360's

my block was decked, heads milled a tiny bit and intake was resurfaced. it leaks on the bottom of the ports thru the gasket. (sucking oil into the intake).
my suggestion is to if you have it decked or milled to take the intake and motor before you install it to have it matched by means of angle.(i mean cut the intake to match the angle of the heads).... i think the problem is the decking and aftermarket heads and old used intakes just do match up prefect, and must admit i skipped this step.... the price i pay was 4 wasted gaskets so far..

good luck my ride will be in the 11s next time out. oil or no oil in the intake.