Just as you never know I had a friend that had a Plymouth arrow that was leaking oil like crazy out of the valve cover. I replaced the gasket and didn't help.

Got lucky and stopped by the dealership and talked to a friendly mechanic he laughed and said you aren't going to believe this but it's the fuel pump. He was right when they went bad they would pump air into the crankcase.

Lol I would have never fixed it if it hadn't been for his kindness.