ok well im not tryinmg to hijack the tread but i have a brand new 347 in my car and im having the same problem, just my sepertaor doesnt fill up that fast but the only thing is i am running the intake off my old motor that did the same thing (pull oil up through the intake and soak the runners )i am assuming my pcv is working bc it rattels, but would the screen under it cause this to happen if it had gotten soaked from the old motor it had allmost 150 thousand on it but it was replaced b4. my hole tbody is soaked with oil allso now if i do not have a baffle on my valve cover would tis make it do this i just pulled it out to clear my 1.7 with the new motor
If you don't have a baffle on the valve cover then oil could be entering the intake via the TB/VC hose.
Double check that the baffle and screen are in place in the lower intake as well.
jason