no baffles in the moroso valve cover are hurting you .on oil control big block have to have some type of baffles or tall type breathers off the valve covers. and yes it need to use breathers one on each side or you will blow the dip stick out or blow the seals or oil pan gasket out .i like the mopar type they work good and cheap but not to show look at my car and you will see them on it they work ok. on open breather you will see some oil. i would like to see it go out the get ran back thru the engine. just do not tell green peace