1964 Dart Grüne Hölle Road Course/Track Day/AutoX Project
8/21/22:
I got the vent sorted out. Added a Vent nipple on the Filler neck below the valve, and Teed it into the existing Vent tubing.
I have yet to close the valve and drive a bunch, or throw it into severe RH turns, to test the idea of the valve preventing gasoline draining out of the cap and onto the quarter panel. Maybe next week.