SBF Water Pump WP173 is the right choice if you have a later model front cover on your 5.0 or 351 engine. This is known as the 94-95 design and is also shared by Ford Motorsport front covers. In addition, this has been the design chosen universally for front covers purchased with belt cam drive systems. This pump is shipped with O-rings for a positive pump-to-plate seal. It comes with a std gasket because thee are compatibility issues with several belt drives and o-rings.