GM Big Block V8 Engine; 502 Cubic Inch; Electronic Fuel Injection; 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/ Deluxe 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/ Holley EFI System/ Pro Billet Distributor/ Intake Manifold/ Polished Complete Front Accessory Drive System With A/C/ P/S/ WP/ All Belts And Pulleys