It's possible. The real secret lies in finding a blend door servo that can work. If you ignore for a moment the fact that a 93 doesn't have an OBD2 vehicle network for the unit to talk to, you can get most of the functionality of it but it won't be quite as "smart".
I believe there's either an F-150 or Expedition EATC that was available. Will the servo from that mount and operate your blend door? If you can answer that, then the rest is mere details - power, fan controller, and sensor hookups that are somewhat independent of the model.