Tappet and pushrod upgrade kit for Shovelhead motors using our ZPN235725 or 235726 Powerglide tappets. Kit comes with four new 3/8" diameter pushrod seats to make the Powerglide 5/8" shorter and four new Prolite Worksavers pushrods with complete instruction sheet. Pushrods have 24 treads per inch adjuster bolt and 3/8" ball on both ends. For stock or performance applications. Sets of 4.