Fuel tank vent.

Haha this one was plugged with who knows what. But I'm putting in a new tank and sender so I was thinking about just plugging it off and getting a cap that vents. Idk how well that would work.
Well, I Think, I looked into that (I did the tank and sender at the same time, along w/ the 3/8" line. For some reason, I did the vent line. CRSS won't let me remember.... lol