Well here you go: This is where I loose my reputation.
1. First order of business is wire wheel/sand any and all areas that show rust. You will probably find more. It needs all cleaned to metal anyway for welding. The general rule is to NOT repair anymore than is necessary. Keep the original metal in place. This is why you have to take off all rust to evaluate. You don't use the whole patch panel unless necessary for welding purposes or to fix rust outs. The extra metal you cut off is excellent for other repairs.
2. In my opinion, the only semi difficult part is pic post one, pic four. They make a patch panel for that "inner lower cowl panel".
3. I would probably make patches for pic post one pic two and would buy a rocker patch panel for pic three and cut to length.
4. I would probably buy a cab corner patch panel for the cab corner. Can't evaluate the floor pieces yet. They make that floor repair panel. The flat floor is "the floor" and the angled up piece toward firewall is the "toe board".
Bottom line is they make every piece you need on
these two pages. Except back of cab. The outside radius of that piece is shaped over a piece of pipe.
Some of the reasons I would make some of those pieces myself.
1. Pretty easy
2. Pretty fun
3. Not seen
4. Save money (I do have to say that those patches are very reasonably priced, already shaped and you don't need to by metal, which isn't exactly cheap) But sheet metal is available everywhere for free.