Enginetech RCC262Y Engine Rebuild Kit for 1994 Chevrolet 4.3L V6 Z79 ZR9 VIN "Z"Rebuild kits include pistons, piston rings, bearings, timing chain set, oil pump, and gaskets. Fitment: "Z" Z79 ZR9 5 8" O P; W O T Block. For heavy weight crank. Has no balance hole drilled by # 1 rod journal. Category Part # Sizes Category Part # Sizes Piston Set P1505(6) STD, 020, 030, 040, 060 Piston Ring Set R40056 STD, 020, 030, 040, 060 Bearing Set Rod BB623J STD, 010, 020 Bearing Set Main BC317J STD, 010, 020 Bearing Set Cam CC407 STD Gasket