How Do I Remove Fuel Tank 1964 Dart GT

Clean the threads on the "J' bolt part of the fuel strap, on the passenger side. Clean the area around the filer tube --the best you can. I found out by luck the tank drops much quicker if you do not empty all the fuel.(something about weight & gravity).
It should have a ground strap next to the fuel sender inlet. try to remove with out breaking (good luck).
now have a jack & a piece of plywood under your tank snug it up-- but do not cover your fuel strap.
remove sending unit wire, (cut the rubber hose from frame to sender) loosen filler neck at the 1/4 panel, remove nut on "J" hook-- lower tank--- done---
Lawrence