While the 1965 Corvair was received as a well-engineered high performance driver's car, that accomplishment was overshadowed by the phenomenal market success of the Ford Mustang. GM saw advantages to the route adopted by Ford with the Mustang, a four-seat semi-coupe body on a standard compact (Falcon) chassis with a small-block V8 motor and four-on-the-floor offered as power options. The Corvair was not cheap to produce; developing and marketing a Mustang-style model based on the Nova platform had cost advantages. Unlike the Corvair, a derivative model could evolve within GM's standard lines of manufacturing technology. The 1965 publication of "Unsafe at Any Speed" sullied the reputation of the Corvair line, although the issues had nothing to do with the current model. Under competition from the Mustang and the publicity hit of "Unsafe," Corvair sales plummeted by over half in 1966. GM saw the advantages of developing the Camaro, not the Corvair.