[oldred]

I am installing retractable seat belts/shoulder harnesses in a 64 1/2 Mustang that never had them from the factory and I need some decent mounting holes in the floor at the rocker, actually the inside of the rocker. I can not get to the inside to use nuts because this goes into the rocker from the inside of the car so what I need is some kind of nut (1/2" fine thread) that I can insert into the hole and have it expand and anchor tightly. The ones I am familiar with that would work I can't find and in fact have not seen any in years. Everything else I am finding looks as if it may not anchor tight enough even though the metal in that area should be strong enough to do the job. Any suggestions?

[OneMoreTime]

Those kind of nutplates are hard to find..What I would do is to cut some of the nutplates out of another car and weld them in so I have nutplates in the correct spot..

Hope this helps

Sam