Need tips on droping a Demon gas tank

Why are you removing the filler tube? My guess is to change the cap style. If not read no further

If this car is a 71 it will have a collision impact protection/ vent system tube on the left side trunk extension. You should remove those hoses first and take it off, so you don,t bend the tubes.

71 on back all come out from the inside. 72 and up go in from the outside. They can be interchange but the gas cap will not sit at the correct depth. And you will need to put nuts on the screws that fasten it.

Also dart swinger and scamp tubes are at a different angle and are held on with 4 screws instead of three. Do not use a tube from that style , it will put a wave in the quarter when fastened.

A 1970 duster fill tube is the only correct replacement for your car if you are doing this to change the style of cap . 70 also has a built in vent tube on the fill tube. and you can eliminate all of the 71 vent sytem connections. If you need pics of the different tubes and caps and tanks, I have them ,

Just some info if needed. Steve