The GTX is a special car and gets special standard equipment. Like the torqueflite automatic, Hemi suspension with front anti-sway bar and heavy-duty shock absorbers. Heavy Duty Brakes, wide wheel rims, wide-boot red streak tires and 150 mph speedometer among other things. Now the GTX and the Road Runner buyer can get a new Super Track Pack Option, with a 440 or Hemi. It includes a heavy-duty 4 speed manual transmission, Hurst shift linkage, 4.10 ratio, sure-grip rear axle, high-performance cooling system, dual breakers, Hemi suspension and power disc brakes.