Like geezer said...your sucking air with the PCV you need something to help out with ventilation. New breather "air cleaner" style breathers are readily available. I got a fancy set for my 292. It REALLY doesn't matter which on you use. I have both styles on my 292's and each ventilates fine. The blow by you may want to look into. My 305 v6 has Alot of blow by. lol Literally I went to shut the engine off and I could see steam going from under the hood! lol! Runs fine though! So I ain't fixing something that's tryin to act broken.
