The third-generation Mustang was produced from 1979 to 1993. Built on Ford’s ubiquitous Fox platform, it evolved through a number of sub-models, trim levels, and drivetrain combinations during its production life.
The beginning of a performance revival began in 1982 with the return of the 302 cu in (called "High Output", or H.O., for the first time), last seen in 1979, and the GT trim level. Now producing 157 hp, the re-engineered 302 consisted of new valves, a more aggressive cam, a larger 2-barrel carburetor, as well as a better breathing intake and exhaust system. Trim levels were also revised to now included L (base), GL, GLX, and GT. The Cobra option was no longer available.
Source: Wikipedia, 2012