Pulling vacaum through oil filler tube.

PKRWUD_
So are you saying that all fuel injected 5.0s, whether mildy or heavily modified, should have the tube from the TB to the oil filler tube connected? My thoughts were that when doing a speed run or when the engine is at full throttle, excess oil may travel from the oil filler tube (my baffle is out of the passenger side valve cover because of my 1.72 rockers) to the throttle body and get sucked into the upper intake & into the motor. Oil in my upper intake manifold doesn't sound like a good idea? So should I have that tube connected then? Thanks in advance.