It's my understanding that these cars were sold by Ford dealers in the Rocky Mountian Region mainly the Denver area thus the name "High Country Special" They were pre tuned for high altitude driving.

Yes, they were made from 1966-1968. There is not a lot of info and they are VERY, VERY RARE. For 1966 & 1967 the HIGH COUNTRY SPECIAL option was offered in 3 colors on any body style (Unlike 1968). The Color options included; Columbine Blue, Aspen Gold & Timberline Green, and the front fenders were marked with a Brass "shield" emblem. In 1968 only coupes were used and they also offered the California Special (GT/CS) The GT/CS & HCS options included; Fiberglass trunk lid and quarter extensions, '65 Thunderbird tail lights, Pop-off gas cap, Fiberglass side scoops, Chrome quarter panel script (GT/CS only) Unique body striping, Blacked out front grille, Fog lights, Quarter turn hood locks. I believe the production is as follows: 1966 Production of the HCS 333 1967 Production of the HCS 416 1968 Production 4118 GT/CS & 251 HCS