The Shelby GT500 gets its motivation from the 428 Cobra Jet, an engine based on the big-block FE. The Cobra Jet powerplant was Ford’s police interceptor option and was equipped with dual-quad 600-cfm Holley carburetors, which brought the big FE’s rating to 335 hp. Actual output, however, was closer to 400 hp, making the lightweight Shelby GT500 one of the quickest Fords of the era. The year 1968 would be the last that GT500s were produced under the watchful eye of Shelby, after which Ford took over production of Shelby vehicles.
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