My father owned this Avion back in 58 or 59 It was green and didnt say USAF on it.It was kept at the local airport in Dekalb Ill.Ryan Navion N4858K
Aircraft N4858K
The plane's name is Navion, based on the orignal manufacturer's name, North American Aviation.
This particular aircraft, although painted with USAF insignia when I photographed it, was never a military plane.