Vent tube question 68 Barracuda

The 1/4" tank vent HAS NOTHING TO DO with filling your tank, although it is important that it be open for proper tank venting while driving

"What vents" your tank during filling is the divider baffle shown in one of the photos above. This "encourages" fuel to run down the bottom side of the tube, while leaving an open air passage to the top.

We don't have the "Oregon style" fuel filler vapor boots on filler nozzles. This may be an issue as may be too high pressure at some pumps. Or your baffle may be damaged/ missing