Early A floor repair options?

If you have a convertible and remove the frame, but you have a unibody. Unless you cut most of the body away then no bracing needed. On 66 barracuda above, although I did the pans one side at a time, the cut away was done on both sides. Must have replacements in hand for final cuts. You can cut out the rust holes, because the metal is "unweldable" in the rusted out areas.