All parts are clean, guaranteed. Two standard crankshafts, 0.00 reamed, guaranteed. Four heads, number 823, guaranteed. (Sold 💥) Two sets of pistons and connecting rods for 6.0, guaranteed. 6-speed transmission torque converter, guaranteed. Crankshaft pulley, guaranteed. GM alternator, guaranteed. (Sold 💥) Two water pumps, one GM and the other Mexican, guaranteed. (Sold 💥) Four head covers. Front timing cover with seal and sensor, guaranteed. Power steering pump, guaranteed. One clean engine mount. Air reservoir with sensor, clean. (Sold 💥) GM oil pan, clean. (Sold 💥) Two camshaft gears. GM compressor. (Sold 💥) Lifter housings. Throttle body, clean, guaranteed. (Sold 💥) Clean original headers. If you need any part not listed, contact me, it might be available.