A-body armrest - stripped threads in door’s sheet metal

Super-Cuda said
That should work ok.

Use this.

Permatex® Steel Weld 4 Minute Metal Epoxy

LOL !!

Just posted several different model 71 doors, none with the reliefs for the clips.

Why would Mopar do that??

The lower seat back bolts are similar in 71, basically a lag screw run into the floor.