the cars had 5 lug wheels Bruce, and the front hubs interchange early car to truck, but if you've got 5 lug wheels on the back the rear end isn't original
all years of trucks had 15's and 16's - most years the 15's were the base equipment with 16's optional for slightly higher GVW .... if your wheels have 6 hub cap clips they're pre-55, after 55 they had 3 clips until 60
widen your search, any year truck will fit the lug pattern and up to 1960 have the hubcap clips, later 15's into the 70's also fit and you can add the clips
Bill
