GM Small Block V8 Engine; 6.3L/ 383 Cubic Inch; Automotive; 440 Horsepower/ 463 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 8.9:1 Compression Ratio; 3.75 Inch Stroke; Front: Internally Balanced/ Rear: Externally Balanced; With Cylinder Heads/ Steel Crankshaft/ Forged Pistons/ Hydraulic Roller Camshaft/ 4 Bolt Main Block/ 1 Piece Rear Main Seal/ 5.7 Inch Forged I-beam Connecting Rods/ Valve Covers/ Oil Pan/ Timing Cover/ Power Adder Engine/ Dual Keyway Crank/ Harmonic Balancer