Shelby GT500 KR
In 1968, Ford introduced the 428 Cobra Jet engine, and Shelby was about to use it in his line of Mustangs. He wanted to do something unique; the result was GT 500 KR – King of the Road. The 428 Cobra Jet had 335 HP, but everybody knew that the engine delivered more than 400 HP and 400 lb.-ft of torque (via Supercars).
The production was highly limited, and the GT500 KR was also pretty loaded with interior trimmings and luxuries. Unfortunately, Shelby produced the GT500 KR for the 1968 model year only and Ford dropped it for 1969.