Chev 350 V8 Vortec Engines Holley Cast Aluminum Timing Cover # HO21-153Chev 350 V8 Vortec Engines Holley Cast Aluminum Timing Cover # HO21 153 Timing Cover, 1 Piece, Aluminum, Black, Chevrolet, Small Block, With Crank Sensor, Each Cover Style: 1 piece Cover Material: Aluminum Cover Color: Black Cover Logo: Holley Timing Pointer Included: Yes Bolts Studs Included: Yes Gaskets Included: Yes Remanufactured: No Quantity: Sold individually. Notes: Includes provision for crank sensor. Will not clear double roller timing chain.