Looking the same on the outside as its GT350 brother, the 1969 Ford Mustang Shelby GT500’s differences were under the NACA-ducted hood. Offering 335 horsepower and a whopping 440 lb.-ft. of torque, the Shelby GT500 could run to 60 mph in six seconds flat and reach 102 mph in a 14.0-second quarter-mile.