I recently replaced the four (4) sections of floor pan - as rockers, undercarriage, etc. were solid. Interestingly mine rusted from the top down (convertible) vs. from the undercarriage up. I purchased the right and left full length floor pans (from CarID as the shipping is very reasonable) so that; 1. I'd have extra material to work with if necessary and 2. given that the cost for the full length pieces are cheaper than buying the four smaller sections. This job took me about 8 hours including cutting and welding. I also reinforced the transmission tunnel which added a few more hours. I then covered with bed liner to seal them up. I had considered replacing the entire pan but assume this would have been a three (3) day project.