For the AMC AMX of 1978, see AMC Concord.For 1979-1980, see AMC Spirit.The AMC AMX is a two-seat GT-style sports car that was produced by American Motors Corporation for the 1968 through 1970 model years. The AMX was also classified as a muscle car, but "unique among other American cars at the time due its short wheelbase". The AMX was also the only American-built steel-bodied two-seater of its time, the first since the 1955-1957 Ford Thunderbird.