Assembled engine, completely built from aftermarket parts. Comes with a kidney style cam gear cover, chrome rocker covers, chrome lifter blocks fitted with hydraulic tappets, stock style pushrods and camshafts with stock timing. Cylinders are 3 7/16" bore with 8.5:1 standard compression pistons and rings. Crank has 3 31/32" stroke. Top end includes stock type single plug heads with stainless steel valves. Pre-run factory tested for oil pressure. Order manifold, carburetor and generator separately.