Tyre / Rim compatibilty question, Please Help!

[1976 sno-fiter]

On the dual wheel application's the wheels are coined.
Every other hole is convex and concave,
and they use a lug nut that is concave.
When you put the two wheels together in the rear they nestle into each other.
I made the mistake of picking up Ford flat face wheels, sanding and painting them only to find out that it caused a death wobble in the front.
Wound up buying new coined anyway ( so much for saving $ buying used wheels).
There was no real problem in the rear because the truck had a 4:88 ratio
and at 55 it was screaming.

[1976 sno-fiter]

This W300 that I had was a 1973 with drum brakes all around.
Besides the wheels being coined, the base of the studs on the drum face were convex so that the wheel would center when mounted.
I don't know what years this wheel applies to other than the early 70's