The car retains its original engine,with factory W-455 aluminum intake,original notched valve covers, 7040256 carb which was rebuilt and re-plated to factory specs, original large valve "F" casting heads ,original 1111977 distributor,etc. The car contains its original 1970 Ram Air Air Cleaner that is functional as well. The engine was professionally built by Bill Travato at BTR Performance in Rochester New York, who specializes in building these rocket engines..No expense was spared from this complete professional build. The engine is stock and not modified other than being bored 30 over.. The transmission is the original M-21 4 speed transmission which was sent out and professionally rebuilt.. The original 12 bolt "O" axle 3:91 ratio posi has been fully rebuilt with new clutches,seals,bearings, brakes, and the original brake drums have been restored as well.