GM Big Block V6 Engine; 8.9L/ 540 Cubic Inch; Carbureted; Automotive; 670 Horsepower/ 660 Foot Pounds of Torque; Cast Iron Block/ Aluminum Cylinder Heads; 10:1 Compression Ratio/ 4.5 Inch Bore/ 4.25 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 6.385 Inch Connecting Rods/ Valve Covers/ Oil Pan/ Timing Cover/ Harmonic Balancer/ Spark Plugs And Wires/ Carburetor/ Distributor/ Intake Manifold/ Polished Complete Front Accessory Drive System With A/C/ P/S/ Alt/ WP/ All Pulleys And Belts