My brother has a 68 El Camino with a 350 motor that the PCV valve has been deleted and a breather has been placed on each valve cover.... he has been told that the PCV valve is not necessary on his classic car. What is the opinion out there of the PCV delete. Especially on our Gto‘s. I have a 66 Gto with a tri-power.. Delete the PCV valve and put another breather on one of the valve covers? I’m thinking not!