If the second line is a smaller diameter, it is likely the vapor return line. If not, then creative plumbing.
Check your fuel pump. If it does not have an inlet, an outlet, and a vapor return line, then you can plug the vapor line but check to ensure you have a vented gas cap or filler neck.
If you have a vapor return port on your fuel pump, use it.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
