[Crvett69]

pcv valve will be attached directly on the valve cover or a hose coming out of it but usually excess pressure will push the seal out or leak at a old one like the rear main, its possible your crankshaft has a nick or droove the the front where seal ride or the drain hole it plugged, if your sure its the seal leakind and not the gasket holding the oil pump on you might need a crankshaft sleeve repair kit. its a think sleeve that fits over the end of the crank. you can get a new pcv and try it and make sure hose going to it is clear first