I am running a breather on the back side of eld. two four intake and I plumbed the pcv valve into the fuel pump block off plate , used a oil pump pickup tube , bolt pattern almost the same as block off plate , used a short piece of hose and a 90 degree pcv , with hose clamp . use that for oil fill also , small funnel , almost can't see it , works very well . I also put some filter foam in the intake stand pipe on the back of the intake to make sure no dirt gets sucked into the engine , no oil leaks at all , have put about 3000 miles on ranchero , 390 , two fours and a four speed .