This is the link to my post about floor repair:
https://www.transamcountry.com/community/index.php?topic=85342.0It appears from your post you are beyond the point where I have temporarily stalled. How did you address the uni-body framework that contains the subframe mount points shown in the pictures I have posted? My floors are in pretty bad shape, worse than yours appear in this post. I have my concerns listed in my post. Is there something I have not thought of yet? I reached out to an aftermarket frame manufacturer who has photos of a second gen. F body on their site for advice/ideas/inspiration, but no reply at all. Frustrating.