[bowtiemanchevyman]

first, with the pan off lay the gasket on the pan, does it fit? if not you cant use it. you may has to use the four piece gasket. some pans use a thick gasket up front, some use a thin gasket. that onepeice u have is really nice i would go buy a new pan, that uses the thick gasket up front, i got mine from jegs for $40 and its painted black inside and out and work great.