I finally had some time to start tearing into the cars interior today. I removed all the carpet and pad so I could determine how much of the floor had to be replaced. I'm going to salvage as much of the original floor as possible so I just need to cut out any of the bad flooring areas and weld in replacement pieces.
Here's some pics of my progress so far.
carpet removed.
Floor rusted out around floor support
Rusted areas and patches needed
I'll update with more pics as I go.
