I was replacing the valve cover gaskets on my 305 and discovered the passenger side cover is partly rusted out in the middle of the flange on the side facing the exhast manifold. Moreover, I would like to get replacement valve covers that are compatible with the stock PCV system. Also not looking at spending big bucks on fancy valve covers. I see RPC makes stock replacements with baffled breather openings on both sides similar to stock. Anyone have any experience with RPC or other stock style replacement valve covers?