The Edelbrock/Musi 555 part #49550 Big-Block Chevy crate engine is a powerful big cubic inch package that features the all new Edelbrock E-CNC cylinder heads for the ultimate in performance. This engine delivers an incredible 676 horsepower and 649 ft-lbs. of torque on 91 octane pumps gas. The Edelbrock E-CNC cylinder heads are fully CNC ported to achieve optimal air-flow for maximum horsepower and torque in high Performance's street and light duty racing applications. This crate engine features exhaust port exits in the stock location, which allows for the use of off-the-shelf headers. Each engine is assembled by 8-time Pro Street World Champ Pat Musi. The crate engine carbureted package includes a Victor Jr. intake manifold and 800cfm Thunder Series AVS carburetor. Engine Specifications:- Displacement: 555 c.i.d.- Horsepower: 676 hp- Torque: 649 ft-lbs.- Compression: 10.0:1- Block: Big-block 9.8"- Crankshaft: Forged Steel 4.250"- Pistons: Forged- Camshaft: Rollin' Thunder Hydraulic Roller #2264- Rocker Arms: 1.7:1 Roller- Manifold: Victor Jr. 454-R #2902- Cylinder Heads: E-CNC #79555- Carburetor: Thunder Series AVS 800 cfm carb- Distributor: Included- Valve Covers: Cast Aluminum- Warranty: 2-year / Unlimited mileage