We Never U A Pcv Valve On Our Engines, If Your Worried About Crank Case Presser,use A Ford Atarus Ect Vac Pump,keep In Mind ......
No High Performance Engine Should Have A Pcv Valve,any,and I Mean Any
Oil That Gets Into Intake Decreases Oct Rating Of Fuel,even 1 Drop Of
Oil,also Adding A Ect,or Belt Driven Case Pump Makes More Power Too...