My throttle pedal's upper mounting point busted a few years ago, and the upper bolot itself partly stripped, so that I couldn't take it out.
It made for a very flimsy throttle, that would essentially bend sideways, and almost get in the way of the brake pedal. I finally decided to fix it,
And I also wanted to raise the brake pedal towrds me a slight amount. When I finally got around to digging into it, I fould that the firewall metal itself was broken away. So, Me and my buddy cleaned the area, and welded a new piece of steel with a new nut, onto the firewall, repairing the hole. Then, We welded a flat square, 1/4" plate against the back of the pedal's mounting tab, and reinforced said tab to eliminate side bending. The small area where the pedal plate mounts to has an area to it's left, that drops away, allowing for additional flexing of the pedal against the firewall metal. On that side, I also welded a small support section behind the new plate, to help against any possible 'rocking' of the pedal bracket.
All metal was powdercoated gloss black, and looks completely stock, because all of the fabrication is really hidden behind the bracket. If I get a chance, I'll take a pic or two when I get home. In all, it makes for a MUCH firmer pedal.