Re-Installing Tank on 67 Barracuda

Do you have NB or FB? I think you want to drop the tank down about 6" and support it. Feed the filler tube in from the top. Twist the tube back and forth until it goes in.

Then lift the tank a little so you can pull out the filler tube and screw it to the rear panel. Then push the tank up the rest of the way, strap it in, and screw down the trunk gasket.