This is a 100% original metal auto. No change in dimensions. Engine – 265 ci 3 5/16 X 3 3/ 4 Ford Flathead, Max1 cam,, Holley Carb, Offy heads Transmission – 200-4R O/D, Lokar shifter Rear Axle – New 9 hub to hub Currie 31 spline/brakes Fenders in Black Cherry Body and fender accents in Black Cherry Pearl Interior features leather and naugahyde upholstery with genuine Bird`s Eye Maple wood details. Too many special details to list.