Had a buddy who owned a '59 or '60 'befinned' Caddy 4 door sedan in white many years ago........it was rather tatty in appearance. It had the then optional (and troublesome) extremely rare air suspension option.
Seem to remember it having a huge 12v 'V' twin compressor mounted in the engine bay on the drivers side inner fender. GM's system was well known as being prone to air leaks - Roys car was no different (probably worse) and the 'pumped-up' air reservoirs would leak-out all the stored air after the car was left parked.
When we all would go out in our respective cars on a cruise we would always have to wait for 10 minutes for Roys Caddi to 'pump-up' the reservoirs.
He would have to be careful parking near a kerb as the body could 'catch' the kerb edge or prevent opening a door on one side.......yes it settled that low, literally on the ground, and a look that today people would die for.
The comfort and ride really was very good (for a Cadillac anyway) noticable better than a stock 'sprung' Caddi. On a very quiet night you could always hear a very faint 'hissing' sound comming from Roy's Caddi as the system leaked air!