My stock needle moves in a rhythmic manner due to sloshing gas in the stock tank, and I take pleasure in it, as it means that it is reading SOME gas in the tank as opposed to being stuck at 1/2 full when I am actually running on fumes. How much is your needle moving?
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission