COMP Cams Timing Cover Chevy Big BlockEliminate timing cover flex which causes erratic ignition timing. Allow Camshaft to be replaced without disturbing the oil pan Seal. Simple endplay adjustment with dial indicator access hole. Integrated timing pointer simplifies ignition timing checks. Compatible with all water umps and most Gear drives. Catalog User 1 This Part Fits: Year Make Model Submodel 1990 1993 Chevrolet C1500 454 SS 1990 1993 Chevrolet C1500 Cheyenne 1990 Chevrolet C1500