excessive 340 crankcase pressure

Yes, I should've posted a "correctly functioning PCV set up", if it isn't working all bets are off.

BTW the 434 made 3 more HP with the PCV valve hooked up over just the one valve cover vent and no PCV valve.

It might just be me. I'm lazy as HELL. So I always choose the easiest thing first. LMAO But a lot of times, I've been right.