[blucar]

Ford used the 16" 5 on 5 through 1966 on the F100's and passenger cars through '48. The later model, '57-66 will be 5'.5" across the bead. The thing to watch out for are the inside hub cap knobs in lieu of the external knobs..
I think I have at least a half dozen '40-66 4.5." wheels in my wheel stock.