Ron,
You need to live closer to the edge. Drive your baby till she's out of gas. I'll bet she'll take 20 gallons then.
I run mine until the needle quits wiggling from the sloshing gas. I know that I have 20 miles until I need to be next to a gas pump.
Edgy Carl

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