I am running two -10 an bungs off the back of the valve cover to a catch can with a -10 drain back to the oil pan .Works perfectly the pcv port on the block is left open and nothing comes out .If the pcv fitting on the block doesn't have a vac*** to pull it open then it stays closed and nothing comes out .I have the valve cover barb capped off and the intake port on passenger side should be capped also with this type of set up .