Unique Ad
GM wanted to advertise their new model 1977 cars to the ambulance industry but due to the complete tooling changeover required for the down-sized 1977 chassis, no one had a finished ambulance ready for photography. So GM used a photo of a 1976 full-sized Superior ambulance and airbrushed the new down-sized 1977 chassis under it. Compare this photo to the way the final 1977 Superior models looked and you will notice a big difference!
