I don't know all the differences but I think they were still using up pre war parts in 46. My truck has a leather gasket around the gas filler neck but I was told in 46 it was rubber. My truck also had black curved door handles. My truck seemed 100% stock but who knows. My truck has weld beads at the base of the A pillers. It is a delux in that it has two windshield wipers. It is titled as a 46.