Hi, thank you for this info. I just got a '76 Seville. Love the car. It's not perfect but it has a lot of promise. I'm trying to figure out the ride control. I climbed underneath (really, climbed underneath?) and trying to identify what's under there. I too was wondering where the compressor was. When I was near the rear axle, I did see small hose from each air shock that led to a tee.There is a tire valve end with no cap. Is there supposed to be more? I see the level "switch" nearby. I haven't been under hood yet to find compressor.
Anyhow, looking forward to everyone's knowledge. This is our oldest car yet. Have two other Cads and a few other cars.
Thanks,
Rob