PCV system

The PCV is only a metered vacum leak no more no less. The main issue is when you change cam specs and lose vacuum how do you know what your pcv should flow? Maybe find the amth formula then find a pcv valve and your set. For me I run Duel breathers on my 340 with no issues at all. Remember back in the day when the PCV didn't exist. I dotn think guys where popping the dipstick outta the tube and pushing oil seals where they? The PCV draws the crankcase vapors which contain envionmentally harmful unburned Hydrocarbons and sends them back through the intake and combustion chamber to be burned again so nothing can leak into the atmosphere. If you really want I can dIg out my tech books from school and quote things for you.