The HP 290/350 is GM Performance Parts' value leading crate engine, with 290 horsepower @ 5100 RPM, and 326 lb-ft of torque @ 3750 RPM on 87 octane fuel.

The HP 290 horsepower will provide great long term durability with its 4-bolt mains, PM steel rods, strong cast aluminum pistons. The camshaft has .450" intake and .460" exhaust lift with hydraulic flat tappets. The cast iron cylinder heads have 1.94" intake and 1.50" exhaust valves with 76 cc combustion chamber. The heads have the conventional 12 bolt intake manifold attaching design used from 1955 through late 1980. This engine was designed to work with the following components: intake manifold 10185063, HEI distributor 93440806, balancer 6272221 (not currently available with GM, please email customer service for availability), flex plate 471529,you will also need a small block starter, water pump and fuel pump.

This 350 engine is not intended for marine use, and should be used in 1979 or earlier pre-emissions street vehicles or any off road usage.

Technical Notes: GM Crate Engines are horsepower rated to SAE Standards.

This engine is not intended for vehicles with fuel injection. This engine is designed for carburated applications prior to 1985.