Shelby automotive and the GT/CS Shelby Automotive, now part of Ford, was assigned the task of designing and engineering the necessary parts and assembly procedures for the GT/CS. This was done right alongside the development of their 1968 Shelby. The fiberglass parts were crafted at A.O. Smith, in Ionia, Michigan, in steel molds. A.O. Smith was also the same OEM manufacturer for the Corvette fiberglass bodies. The completed fiberglass parts for the GT/CS included: the rear decklid and end caps, taillight panel, and side scoops (RH and LH).