Looking at the steel floor plate, its looking like it might be more work to repair the rotten spots than to just cut the whole thing out and replace it. The floor has ridges formed into it for strength. How'd a guy go about recreating them on a flat piece of sheet metal?
Yeah I could be wrong I never had a close look at it after. Some guy wanted it for the rearends so we sold it.
You could weld some 3/16 or 1/4 round stock or 3/16 or 1/4 x1/2 flat strap to the underside of the sheet for strength. Use whatever direction fits best. Can even lay it out in a diamond or square pattern if necessary.
With a bead roller. I have one from harbor freight, it goes on the vise to hold it. Have made patch panels for cars with it, works great.
x1 on the bead roller, or even my all time favorite body tool to reference, the English Wheel. Myself I'm not afraid of straight angles, which can be covered up with some interior finishing parts, or ground down and painted, or both. I'm a fan of cranking the heat way down on the MIG welder. I am horrible at TIG welding, Driving truck or running equipment I feel like I have the best hand eye coordination in the world, but get me set up with a TIG setup and sit back and watch the sparks fly, from under the hood! I use my quick start stop technique with the MIG for keeping the heat out of the metal. It's probably not the strongest, but any Sheetmetal work I've done with it has held up fine so far!
Got my first good look at the firewall. Its salvageable but honestly not worth the time IMO. Got a really great idea for what I'm gonna do with it. Under wraps for now though.
