Floor pans look fine, just surface rust from what I can tell which isnt a big deal for a 30+ year old car. The proper solution for it will vary depending on how original and correct you want to keep the car. I took a lot of pictures of mine to prove that is was in good shape and POR15 the whole thing.

I agree to not throw a new harness at the problem unless the original harness is in questionable shape right now.