ORIGINAL: Montague
What I want to know is, how do you get all that brass tubing going in all kinds of directions into the tank in the first place

.
(I hate putting together fuel tanks, and I've taken to using a normal clunk line for the fill/drain instead of brass tubing going to the bottom of the tank. Other than that, I tried a dubro fill thingie once, and one other brand of fill thingie years ago, and I quickly decided that they just aren't reliable enough for me).
I sometimes will bend one line down for filler and one up for vent. To get them in the tank turn both in the same direction and turn them where you need them after they are inside. (it helps to mark the side of the tube on the outside with a marker so you know which direction it is in if you can't see inside the tank)