"My logic was that there just would not be much air coming in through that drain back hole so I did not worry about it."
59 fleet,
On my ;36 the oil drain back hole passes so much air that neither manifold vacuum from the running engine nor my air conditioning service vacuum pump pulls enough vacuum in the crankcase to move my vacuum gauge needle at all. For comparison purposes I sucked on the vacuum gauge and that registered 10" of vacuum.
I think I should accept reality and conclude that because sealing the entire bell housing area with its many openings is not practical the PCV concept is not practical without a conversion to install a rear main seal.
Thanks again to everyone who commented on this project.
