BESTgasket is the world's premier manufacturer of gaskets for vintage and classic American cars and trucks. BEST Gasket oil pan gasket set for 1956-1958 Dodge and Plymouth models using a 277ci, 301ci, 303ci, 313ci, or 318ci "POLY" V-8 engine. P/N 22023. BEST Gasket is the leading name in sealing performance in the restoration industry.