(from Wikipedia, the free encyclopedia) As Lee Iacocca's assistant general manager and chief engineer, Donald N. Frey, was the head engineer for the Mustang project — supervising the development of the Mustang in a record 18 months — while Iacocca himself championed the project as Ford Division general manager. The Mustang prototype was a two-seat, mid-mounted engine roadster, styled in part by Phil Clark. The Mustang I was later remodeled as a four-seat car styled under the direction of Project Design Chief Joe Oros and his team of L. David Ash, Gale Halderman, and John Foster — in Ford's Lincoln–Mercury Division design studios, which produced the winning design in an intramural design contest instigated by Iacocca.
To decrease development costs, the Mustang used chassis, suspension, and drivetrain components derived from the Ford Falcon and Fairlane. It used a unitized platform-type frame from the 1964 Falcon, and welded box-section side rails, including welded crossmembers. Although hardtop Mustangs accounted for the highest sales, durability problems with the new frame led to the engineering of a convertible first, which ensured adequate stiffness. Overall length of the Mustang
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