Replace panels before or after dipping?

Dip it first and see what you have before you do any cutting. I'd replace the whole floor pan. I have a 69 Dart GT conv that is a Flintstone mobile also..lol. I already have the full AMD floor to put in it. It will be less welding to replace the full floor, and you will gain valuable welding skill and confidence doing it. you Tube is your friend to learn stuff. Watch Fitzee's Fabrication channel to learn about patching and welding. Be forewarned though.....he's one of our great Neighbours from the north and he may have already heard about you making fun of their spelling and blocked you from his channel. :poke:

:rofl: