Chevrolet Big Block; 454 Cubic Inch V-8; Automotive; Cast Iron Block/ 4 Bolt Main Caps; 4.310 Inch Bore/ 4.000 Inch Stroke; 1 Piece Rear Main Seal (Must Run Electrin Fuel Pump/ No Provision For Mechanical Fuel Pump); Externally Balanced; With Stock Crankshaft/ Stock Rods/ Hypereutectic Pistons/ Moly Rings