Where did my gauge fluid go

[deuce_roadster]

My 32 and 33 with stock fuel gauges that I restored (as well as senders) over 10 years ago still work perfectly. After the car sits for an extended period, you have to drive it around and let the gas slosh around for the indicator level to come back up. You can accomplish the same thing by rocking the car from side to side. I believe the airline pressure eventually bleeds back to the tank.