BESTgasket is the world's premier manufacturer of gaskets for vintage and classic American cars and trucks. BEST Gasket valley/pushrod cover gasket set for 1955-1956 AMC, Packard, Hudson, and Studebaker models using either the 320ci, 352ci, or 374ci Packard-designed V-8 engine. P/N 20073E. BEST Gasket is the leading name in sealing performance in the restoration industry.