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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, flex plate 471529,you will also need a small block starter, water pump and fuel pump.