‘64 Dart Three Point Seatbelt Help

It doesn't have to. How good a welder are you? You could reinforce a good area with 1/8" plate curver to fit flush and weld it on with a nut welded onto the back side and recess it into a hole in the B pillar. Weld it on the B pillar and paint to match. It could look fine if you can weld really good. IMO, that would be acceptable as a crash restraint. I would "guess" maybe a 3" x 3" piece of 1/8 plate would be sufficient.

I’m pretty good at welding. Not perfect of course. The plate they provide seems to be 1/8” but is more like 1.5”*5” or so, with a nut welded onto the back and two holes for retaining screws.

I’m thinking that I could cut a hole just big enough for the nut to fit through, grind down the paint, and then fit the plate flush against the pillar, held in place by two self-tapping screws, followed by a few tac-welds and then going through and welding around the entire perimeter.

I think that may be good enough

Edit to add: I plan on taking pictures of the entire process and creating a how-to of this