JIMS, Powerglide hydraulic tappet. +.005" o.s. 53-84 B.T.(NU)

The hydraulics used will work with both hydraulic and solid style camshafts. An excellent replacement hydraulic tappet for stock and high performance applications. Made as an oversized diameter replacement for 17920-53A (hydraulic unit) and 18522-53A (tappet). Note: Standard O.D. is .731". Note: Upgrading 66-84 Shovels to JIMS pushrods? Use the MCS 978053 JIMS Powerglide upgrade kit. JIMS Note: some 78-84 H-Dr tappet blocks have oil drain hole location problems with some high lift cams.