there weren't "leftovers" used, the beginning of a model years production back then was the late summer/fall of the previous calender year, and parts used weren't necessarily dated the same month or year as the vehicle, but they wouldn't have put the axle on the vehicle if the vehicle was supposed to have a newer feature - if your title says 1950, then it was first titled in 1950 and it's likely a 1950 in most, if not all, details .... what's the ID on the door tag say?
Bill
