It's hard to tell from pictures, but in the second set of pictures inside the quarter there appears to be some rot at the door jamb structure. It's really hard to tell. Get in there with a shop vac and clean it out real good.
The floors look good from the picture, but you're the one looking at it in person. I, for one, wanted a clean undercarriage, so I replaced my entire floor and trunk. My trunk had some ugly rust holes under the spare tire, and the floor was rusted in the same area as yours, but slightly worse (mine was pitted and rusted through. It depends on how far you want to go with it. The floor replacement is not hard, just time consuming. The same goes for the full trunk replacement. As i mentioned to you on the phone, DON'T buy the 68 pan. Buy the 67 since you'll be removing the shock towers anyway when tubbing it.
Looks good. Keep the photos coming!