Built almost exclusively for California dealers and inspired by a secretive Shelby prototype, the 1968 Mustang GT/CS combined fog lamps, a rear spoiler, and exclusive striping into a distinct model Ford never planned as a mainstream offering. Production fell short of its 5,000-unit target, and the car’s own name is still debated by historians decades later. Read on to find out how one regional sales manager talked Dearborn into building it.