[jocko]

I think the standard 71+ K5/10 wheel is 15x6 and the optional is 15x8.25. 71+ K5/10 wheels were 6 lug, 4 nub, and cleared disk brake calipers. Most of the optional wider K5/10 steelies I've seen were on Blazers also it seems, but they were available on any 1/2 ton 71+ 4x4. A few aftermarket places make them or close replicas, wheel vintiques, etc.