I'm aware of the tri five chevy wiper motor swap, but finding one in Sioux City Iowa that is any good at a decent price is impossible .Thanks

Are you referring to adapting a SUV rear wiper motor to a 57 Ford? If so, why? Most SUVs that I am aware of have only a single wiper blade, so you would likely be retaining the factory cable and pulley wiper mechanism. And if you are keeping the cable and pulley setup, a Tri 5 Chevy electric wiper motor is a straight forward 5 minute (literally) bolt on swap. Even the original wiper knob and cable fits directly on to the Chevy wiper motor.

Do you still need me to take a pic?

The last few posts are correct. Gaged nut as shown, not welded in. I think the spot welded /threaded plate Gary was talking about is for the hood bumper.

A caged nut is a square nut held in a spring steel cage. The cage is pressed into place and holds the nut. They come in different finishes. Here is a picture of one.

May have have to settle for sheet metal.  Sounds like a hard part to find

That little rectangular hole takes a caged nut but is not welded in.

GLR7533, Thanks for the pic. That answers it almost completely. Just not the caged part-but that is coming with all of the places I have asked someone is bound to know. Now I just need to finalize my solution.

anybody adapt an electric rear window wiper motor from a SUV to vacuum wipers

I don't remember either but this picture shows a square hole so I am thinking it has to be a caged nut.
Jerry