EDELBROCK ACCU-DRIVE GEAR DRIVE SMALL BLOCK CHEV

Edelbrock Accu-Drive timing gear drives won''t stretch or wear out, the way timing chains will. They provide up to eight degrees of cam-timing adjustment in two-degree increments and have offset bushings for easy cam indexing, as well as SAE 8620 steel gears that will operate at higher rpms. An Accu-Drive will fit under your stock timing cover and will generate that "gear-whine" sound we all love. Minor machining to the engine block may be required. Notes: Not designed to work on engines with a knock sensor. Camshaft Gear Attachment: 3-bolt. Gear Drive Idler Style: Dual idler. Maximum Advance/Retard at Camshaft: 4 degree. Maximum Advance/Retard at Crankshaft: 2 degree. Thrust Bearing Included: Yes.