True SS (37) built in calf. (Van Nuys). Power train switched out to the Crate ZZ502 9.6:1 comp ratio, 4-bolt main, forged Aluminum pistons, forged steel crank and connecting rods, oval port Aluminum cylinder heads. Big exhaust, large size Aluminum radiator with dual cooling fans. Equipped with a Tremec GM-600 5-speed with a 26 spline input and 31 spline output, (.64 fifth gear). Hurst shifter and Heavy duty Disc Clutch and then the Vintage Air. This car is a Great Ride with lots of power to enjoy. The body and paint I would call it a (9) straight and no fade. 12 bolt Posi rear end with chrome cover I believe it is a 3:31 Very nice care ready to drive or your collection. Dyno-Pro Inc Registered (516.9) HP This car is listed for sale locally so the sale could be ended early.