Drtheo, you and I are in the same boat. I have been asked, by a motivated seller to come and look at a 1949 3800 dually, (with a mostly intact Williamson stock rack). Doesn't run and hasn't for many many years. This truck is the 5 window model with those windows intact. It does have a full set of matching and proper 18" wheels, OLD tires.
Al
Alan