A buddy mentioned that there are later model 1/2-ton Chevy 4x4 wheels in 16" diameter that also have 6-lug centers, but we are unsure of the widths, offsets, and lug diameters of those later wheels.
I guess it depends on what you mean by 'later'. The most recent wheels, starting in the late 90's actually have a metric lug circle and though the are very close they are not the same pattern.
That change occurred in maybe '99? The '88 to '98 trucks both 1/2-ton and light 3/4-ton have 6-lug wheels and commonly are 16 inch about the width you are looking for.
However those wheels have a bit of offset that may cause problems on your '54 by hitting the tie rod.
