manifold vaccum for vaccum advance ?'s

................Put in a new pcv valve............yes, u can have a vac leak under the intake....this is a magnum style right?.......there is a gasket under the intake between the intake and plate that bolts to it..on the fuel injected engines anyways......it is very common to blow out and suck oil......also u can have an internal leak between the heads and intake.......kim.........