I keep on having to change my rocker cover gasket because of oil leaking. I heard that some people go for the rubber gasket which fits the sierra 1.8 cvh is this one much better than the cork one and will it fit nicely because i went to order one from Fords and the parts guy told me that the rocker cover will pinch the gasket because its a bit wider is this true let us know what you think CHEERS