Assembled engine, completely built from aftermarket parts. Comes with a chrome nose cone style cam gear cover, semi-polished rocker covers, chrome lifter blocks fitted with hydraulic tappets, stock style pushrods and camshafts with stock timing. Cylinders are 3 1/2" bore with 8.5:1 standard compression pistons and rings. Crank has 4 1/4"" stroke. Top end includes stock type single plug heads with stainless steel valves. Pre-run factory tested for oil pressure. Order manifold, carburetor, ignition and generator separately.