The Shelby Mustang is a high performance variant of the Ford Mustang which was built by Shelby from 1965 to 1968, and from 1969 to 1970 by Ford. Following the introduction of the fifth generation Ford Mustang in 2005, the Shelby nameplate was revived as a new high-performance model, this time designed and built by Ford.
Beginning in April 1968, Ford began factory installing a version of the 428 engine known as the "Cobra Jet". The G.T. 500 was subsequently known as The Cobra G.T. 500 KR. The initials KR stood for "King of the Road". Ford rated the Cobra jet at 335 horsepower (250 kW), but with 440 foot-pounds of torque at 3400 RPM, the horsepower was considered significantly under-reported. Shelby's KR engine was left stock adding die-cast aluminum valve covers with "Cobra Le-mans" to note Ford's FE engine family victory over Ferrari at Le Mans in 1966 and 1967.
The total production of the KR's was 933 Fastbacks and 318 convertibles. The 1968 GT 500 KR was a very special car. Many modifications were made to the stock GT Mustang. The 428 was a the same Cobra Jet engine offered in the stock big block Mustang. It was the old 428 block with a lot of changes. The low riser, revised, 47 heads had huge rectangular ports. Measuring 2.34" X 1.34", the ports were larger than the 427 racing heads. A special dual-plane intake manifold held the mammoth Holley carburator. Stronger connecting rods and crankshaft were replaced the stock 428 pieces.
The GT 500 is going to be brought back to its original factory state once we are completed with it.