Air coming through the valve cover

Ima thinking that would just be an intake gasket, and she's sucking oil from the valley? How well does it idle?
Put a vacuum gauge on the dipstick tube, Pull out the breathers and plug the openings. Start her up.
Vacuum means intake gasket. Pressure means a ring problem.
Or possibly brake fluid from the booster? Check the fluid level.
I would at least check those before tugging her out.