Bought a '63 CJ5 with the 134F it had no PCV. The valve cover cap where these mount was just left open. There was no hose on the dip stick to breather tube. I installed the hose and plugged the cap to keep contamination out thinking the breather would provide enough ventilation. I am now rethinking this. Questions: 1. Is the dip stick to breather hose enough ventilation? 2. Did any of the 134F come without PCV? 3. How do I tell if it is a closed system? Apparently the PCVs are different. 4. If I install one, does it have to route into the Carb/intake? I really don't want to mess up the air/fuel mixture. 5. Does it need to be one of the $40+ units or will one of the $10 generic alternatives work?