it has pc seals and I had pulled two springs off the head to check spring pressure and retainer clearence before i installed the new cam. I cant imagine a fresh valve job have worn out guides enough to suck in that much oil. I did borrow a an intake from a friend last night and set it on the block without gaskets. The original performer rpm would not sit flat in the valley but the second intake does and all the bolt holes line up where the first one not so good. I am not sure but I bolted the new intake on which is an edelbrock c396. I will fire it up tonight and see what happens.