And don't forget; when the engine is reving and working hard, it will create far more blow-by gasses than the PCV can get rid of. They have to somewhere or the pressure will make it it's way out; usually starting with blowing the dipstick out.
The factory routes this extra blow by out the closed system breather, up the hose and into the air cleaner box, where the carb will now suck it in from the top; simply ingenious.
Along comes Joe HotRod and installs a; pretty,chromed up, open faced,air cleaner, and throws the hose away. Now when he gets on it, the factory CC breather pukes it's vapors all over everything. So he goes and gets a shiny Mr.Gasket breather, and limits the mess to on the valve cover, and then gravity and the cooling fan blow it onto the sparkplugs.
What's the solution? IDK.
What I did was; I installed file-fit Plasma Moly rings and limited the ring leakage to almost immeasurable. Then I just re-routed the output from the factory breather thru a hose to the passenger-side shock-tower where it will I suppose, one day,puke onto the tire. So far, at 60,000 miles it hasn't yet started to.
But I have a back-up plan; I left the dipstick a lil loose-fitting,lol.