You can't see much of the interior in these pics, but you can see some of the Air Ride install.
http://wiedos.com/89_Mustang/AirRide/
The digital gage has been replaced with analog dual needle gages. As mentioned above I still have and it can go with the car if wanted. The readings were just too erratic for my liking.
Also, if not mentioned above it is a 4-way (each wheel is independant) Air Ride control setup>