Crankshaft Pulley, 1970-77 Cutlass, 442, 88, 98 w/o A/C, 1971-78 Toronado w/o A/C Crankshaft pulley for 1970-77 Cutlass, 442, 88 and 98 models with Oldsmobile V8 engines (except cars with air conditioning, heavy duty cooling, or A.I.R. system); and 1971-78 Toronado except cars with air conditioning, heavy duty cooling or A.I.R. system. Two groove pulley measures 6 1/4" outside diameter.
Crankshaft Pulley, 1968-77 Cutlass, 442, 88, 98 Three groove crankshaft pullely for 1968-77 Cutlass, 442, 88 and 98 models with air conditioning. Pulley measures 7 3/8" diameter and replaces GM part number 399405.