Special editions were a big part of Mustang DNA. In 1969, there were 10 different engines, Mach 1, Shelby, Boss, GT and Grande variants, as well as promotions including the West Coast Rainbow of Colors and Philadelphia-area Limited Edition 600 promotions.
Some of those are better known than others. For instance, not many people who aren’t dedicated Mustang collectors know that Ford Special Promotion Division built a handful (probably 10) of track-modified and highly-optioned R-code 1970 Mustang Pace Cars for American Raceways Inc. According to the late Terry Fritts of the Twister Special Registry, this would have been