The Montego was introduced for 1968 as an upscale version of the intermediate Mercury Comet, which it eventually supplanted after 1969. It was essentially a twin of the Ford Torino. The Cyclone was a high performance variant of the Montego through 1971.
The 1968 models were available in four body styles: four-door sedan, two-door hardtop, station wagon and convertible, in base and fancier MX trim. In 1969, a luxury MX Brougham trim level was added. also in 1969 there was a ski-pac special not just the mx that came with a 351, posi trac system and a heavy duty heater.
Source: Wikipedia, 2012