GM Big Block Engine; 632 Cubic Inch; Automotive; 815 Horsepower/ 800 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 11:1 Compression Ratio; 4.6 Inch Bore/ 4.75 Inch Stroke; Internally Balanced; With Cylinder Heads/ Forged Steel Crankshaft/ Forged Pistons/ Hydraulic Roller Camshaft/ 4 Bolt Main Block/ 1 Piece Rear Main Seal/ Forged H-Beam 6.635 Inch Connecting Rods/ Valve Covers/ Oil Pan/ Timing Cover/ Harmonic Balancer/ Intake Manifold/ Carburetor