First, I'm going under the assumption that the photo that Tom posted is from the same collection that I viewed 20 something years ago. I guess it is possible that there are two Cadillac collectors out there who both happen to have a red '60 Superior HH Cadillac.
I've killed a lot of brain cells over the past 20 years, but my recollection is that this Caddy, as well as the rest of his impressive collection were original cars, rather than restored. I seem to remember that he had a black '64 Superior funeral coach in addition to the ambulance, but I was much more into ambulances at the time, so didn't pay a lot of attention to it. One thing that did stick in my mind was that the ambulance had a small mechanical siren on the lower part of the roof (possibly a C-5-G or a 77G), which seemed a little underwhelming compared with the presence of the rest of the car. A "Q" or a lighted siren would have matched this car better.
The rest of the surroundings look familiar, except I don't remember all that stuff hanging down from the ceiling, so I suspect Tom's photo was taken more recently than when I had my tour.
Terry