600 HP 496ci Stroker, BBC. Fully balanced blueprinted, torqued, decked, power honed, micro polished, Runs on 91 Octane Pump Gas, 10.5/1 Compression. Street or track. Full race lightweight quick spin rotating assembly, high flow rectangle D port Aluminum heads ( same as Dart ) camned to run on 91 pump gas or ave fuel mix.
Mark 4 block , two piece rear main seal.
Engine is new in the crate, Pro built and ready to ship in the lower US only.