PCV leak

Have you give any thought to the dual PCVs sucking atmospheric air into the crankcase at the formerly leaking rear mainseal, because you know, that the rear main seal is designed to prevent pressure escape.... not pressure intrusion. You could consider it a one-way valve.

new rear main seal again , not tested too much yet.
A friend bought a new 502 crate motor from G M , it had 16 plus inches of vacuum , and made the rear main squeel, he put one of those wagner $75 pcv valves on it to adjust the leak. I think they adjusted it to 14 to 16 '' , stopped the squeel. My 406 sbc GMC waxed his 502 *** !! hehehhe !
The pcv valves dont do squat when the throttle is open, the vacuum is non existant then. I`m toying w/ the idea of pan evacs in the headers for wide open throttle ,been too lazy to get back under the car-------------