Ok. I was blowing oil out from the intake under the thermostat housing. After several failed attempts at trying to plug it with more RTV, I broke down and finally did tear the top end off and replaced the intake and upper plenum gaskets and guess what, it blew out again! I checked the pcv system and it is clear. What else could it be? I thought of the oil pump which I replaced before dropping it in but it is stock pump, shouldn't be pumping out too high a pressure. Any suggestions?