They were on the T-bird chassis, which is pretty much a Mustang. The first couple years they got the low-power 5.0, but went to the 200hp injected version in 87, the 225hp Mustang motor was optional on lower models, standard on LSC. The LSC was the top-of-the-line model, sport touring suspension, enthusiast interior, better stereo, usual stuff...they all had the air suspension, but conversion kits are out there.