I've spent hours searching this site and others trying to find a cure for the pcv problem. My last "built" motor never had this problem, although it had a valley pan gasket.
I did try something today. I relocated the pcv into the driver side valve cover, GN1 vc, btw, and with roller rockers, no oil really hits the hole. Just vapors. I bought a grommet for the vc, and put a pcv in there (unknown pcv, just fit the grommet), then put a clear fuel filter in line, then the stock pcv, then a hose going to the plenum. It worked way better than my last system, which was a pcv in the stock location with no valley pan, and a catch can. It fouled the plugs after a few miles, not good. I just got done driving it around to see how it worked. I still have some oil in the plenum, but the filter has no standing oil in it, just a coating on the walls from the vapor. There may be one or two "drops" of oil in it, but nothing like my last experiment. I always have blue smoke at idle, thanks to my wonderful GN1 heads and their sh!tty valve guides. But it got rid of the smoke I was getting out of the breathers with the pcv blocked. Now I have this setup, with a breather in the pass. side vc, and a breather in the stock pcv location. I may put a baffle inside the vc, but I don't think it will change anything. I'm not getting any liquid oil, since I have T&D rockers, which don't project oil upwards like stockers do. Other than oil on the backside of the throttle blade, I wouldn't notice the oil if it weren't for the power plate. It collects on there.
My next experiment is to put a breather style pcv thing in there in place of the unknown pcv I have now. It looks like the stock breather thing on the stock pass. side vc, but has a foam element inside to stop oil vapors. I found this at autozone, one end fits into the vc, the other will go to a stock pcv valve, then to the plenum. My concern is that it will become saturated with oil very fast, basically becoming clogged. Any ideas?