Valve seals are viton and brand new set up buy engine shop. Rings are installed correctly as I read the directions 100 times over. The block was honed with deck plates and squared to crank CL. I am going to omit the PCV valve altogether. Before I tore it down it was going through oil like mad. Thought we fixed that prob. The blower was completely soaked and had standing oil in the intake runners. As block came out of a sprint car one of the screens was plugged with epoxy not letting the one bank drain back. Thought it was allowing the PCV to suck the oil out.