I remember seeing magazine article, early 70's. Showing Shelby standing next to a S/C type AC. Saying his favorite AC was his 351C powered Automatic. I thought it strange @ the time. But those guys built a lot of different type AC's back then. The 1st AC I ever looked over close was a 260, #53. It had a 2 gallon peach (cut to fit) can for a air duct from the factory! Go figure!!