Update on My 64 Dart project

I forgot to mention that I'm looking for some suggestions on mounting the fuel tank. I originally wanted to cut out the spare tire well but couldn't bring myself to cutting on this car. I was thinking of making some mounts that will raise the tank to just above the bottom of the well and then running the outlet and vent tube through the drain plug located at the bottom of the well. i'll use a "Seals IT" to seal out the weather. Any suggestions?