The floor pans under the carpet actually look normal but I have not removed the seats to see what it looks like either.

I found a frame/body shop close to home where I'll take it at the end of the week. The feedback I got was the same as in this forum, convertibles are mostly susceptible to rust, I shared pictures with them and they want to get a close inspection to see if we can put in place a game plan. Repairing pieces at a time so that the cost is not overwhelming. All in all I think that this visit will help me decide what to do with her, whether there is an action plan or whether she goes up for sale to someone who needs a lot of good parts and will scrap when done.

I'll post my findings this saturday, stay tuned