GM Big Block V8 Engine; 502 Cubic Inch; Carbureted; Automotive; 621 Horsepower/ 560 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 10:1 Compression Ratio/ 4.466 Inch Bore/ 4 Inch Stroke; Internally Balanced; With Cylinder Heads/ Forged Steel Crankshaft/ Forged Pistons/ Hydraulic Roller Camshaft/ Base Dressed Long Block/ 4 Bolt Main Block/ 1 Piece Rear Main Seal/ Forged H-Beam 6.135 Inch Connecting Rods/ Valve Covers/ Oil Pan/ Timing Cover/ Harmonic Balancer/ Spark Plug And Wires/ Carburetor/ Pro Billet Distributor/ Intake Manifold