GM Big Block Engine; 632 Cubic Inch; Automotive; 775 Horsepower/ 750 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 9.6:1 Compression Ratio; 4.6 Inch Bore/ 4.75 Inch Stroke; Internally Balanced; With Cylinder Heads/ 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/ SFI Rated Dual Keyway 8 Inch Balancer