exhaust system pcv?

I hate to ask the almost obvious, but if youre developing that much crankcase pressure, and youre not supercharged,...... where do you surmise that all that pressure is coming from?
-Nice induction,BTW.
I'm assuming here, and that's not good! It was the 318 I had, it was blowing oil everywhere. It was built by lord knows who - with lord knows what! I've heard this a lot on this forum - "I got this old motor and found some good heads and slapped this big cam in it and it runs like a bat out-0- hell ! " well this was one of those motors:) spuwing oil (after resealing), smoking endlessly, but did run like a" bat out -0- hell" til I held third gear through the 1/4 mile:) that's when "all hell broke loose" (or at least the #3 & #4 rod bearings) LOL
I have a new build and don't want any pcv problems. I would like to avoid using the carburetor or intake manifold for pcv. I don't mind smelling hot oil with the 3 breathers on the valve covers, but will this be enough?
Monkey see monkey do- I've seen it on cars at the dragstrip and thought it a good theory?