Hello new guy, I too have a GMC COE truck, I purchase a F350 rolling chassis from a ambulance, it was nice with air ride too, but I had to give it up, the steering gear box was lay down too far, once I mounted the cab on the frame I couldn't connect the steering shaft to the gear box. I am going to try the chevy ambulance frame, hopefully I do better with it. So check the angle of the gear box in elation to the steering shaft before you lay some money on that frame. There was a wise advise by another member to look into a Izuzo frame, I wich I had got that advise before I spend the money on the ford frame. Best of luck. Jesus
