Why am I leaking oil...grrrr

1970 Duster...Thanks for the reply but not running a PVC Valve...Although I did take it to a buddy's shop today and put it up on a lift..We ran a camera up the back of the motor and found that BOTH Oil Galley plugs are backing out...Almost 1 turn each and they will fall out...I will pull the trans this weekend...No idea how I missed that when I had it apart...Thanks for the response!