71 GMC control arm interchange

[bullwinkle]

While changing ball joints I found that my lower control arm is worn. The nut on the control arm shaft fits loose and no longer threads into the control arm.

I assume 71 and 72 are the same because of the disk brakes, but do any other years interchange?

This is RH side on a 71 GMC 1/2 ton 2wd.

I probably should have posted this under suspension. Maybe a mod could move it. Thanks.