brake pedal mounting bracket removal - easy?

[mole2000]

I'm prepping my 1970 c10 for a brake booster and new master cylinder for a frt disc brk conversion. When I removed the master cylinder I was able to see that there was some damage around the brake rod opening. When I looked from under the dash i saw that the tabs with the 4 studs that go through the firewall were all bent and damaged making the 2 top ones misaligned and not extending straight out. I could do a much better job of straightening the things and putting new studs or bolts in place for attaching the booster bracket if I were to remove it. Is that possible without having to weld it back in place? I have no idea how this damage might have occurred- something definitely strange given there is not visible damage elsewhere on the firewall. It's all localized around the brake rod hole.
Thanks.