Ok, I did a search and couldn't find the answer I needed so here goes. I couldn't get my cheap Mr. gasket chrome vlv covers to stop leaking so I picked up a nice looking set of aluminum Holley covers at the local pro shop along with a nice set of extra thick cork gaskets and new rubber grommets. A PCV valve is installed in the drivers side front hole, a non breathing oil filler cap is in the passangers side front hole, and a breather with a rubber grommet made for a non baffled valve cover is in the passenger side rear hole, basically an enclosed rubber grommet with a slit cut in the bottom. The breather fills up with oil and drips on the headers after a short trip down the road. PCV valve is new, I tried two different brands of breathers. I requested a stock oil pump when I put this engine in about a year ago, but with 10w 30 oil, when it's warm I have about 40 psi at idle, any amount of rpm increase and the needle slams to the peg...60psi +? I don't know if that's relevant or even if the stock gauge is accurate, but I thought it might be. Incidentally, the valve covers don't leak any more, but the breather, which was installed in the FRONT passenger side on the old covers and used as the oil filler cap didn't blow oil out in the old application. I get blank looks from local mechanics and the people at parts stores are generally clueless. Thanks I should add, I can not find any type of baffle system, grommet or otherwise for the PCV valve. Both the breathers I've used were the baffle type and on the last one I took the time to position the baffle so that oil coming up and hitting it would slide back down into the valve cover instead of hooking over into the filter media.