In addition to the Javelin AMX, the AMX designation was used on performance variants of other AMC cars through the 1980s, much like Chevy’s SS or Dodge’s R/T. In its short time with us ...
As with AMC's other 343-equipped cars of the 1960s, the Javelin switched to the 290-hp, 395 lb-ft 360 cubic inch V8 for 1970.