Are you using baffled breather grommets?
Those are the ones I'm using.
BUT I had a problem with the baffling restricting too much crankcase pressure from venting out to the breathers. As a result my dipstick would come out a little and blow oil at high boost. So I cut out one of the half moon baffles on the passenger side grommet...that fixed my problem, no more oil out the breathers or dipstick.
I was going to try some steel wool in the neck of the breathers and see if that would help
Sorry man! It's a Buick! If it ain't leaking it's out of oil!
Doug
A Buick that doesn't leak? Why would you want that?:biggrin: