De-rusted the bumper brackets in the dip tank, welded on a couple MIA weld nuts, painted epoxy/summit single stage black/my go-to underbody coating.

The long pins work with a ratchet strap to help me install the part solo. Doesn't work 100% on the bumper because a pinch weld interferes, but helps get it
about 80% in place.

The OE bumper fit the car really poorly, it fought me 30 years ago, and this reproduction rear bumper fought me quite a bit harder, and it took several tries to find the magic shim combination
to fit acceptably well. That and some of the trim did not want to do what I needed it to do. Have to admit a few parts on this thing did kick my butt for a minute.
I'll probably still try to round up another solid OE bumper just to have in the corner in case of future need.