In my personal experience, doing this helped and makes it around 97% accurate.
First thing is most of the time the float will slosh around due to water, particles, and contaminants. The float
will look full when its not or vice versa. Run a good water cleaner like Iso Heet Red Bottle through a quarter of gas. Next take out the dash cluster and slightly manually adjust the fuel needle so it is lined up exactly to the red line. Hammer the inertia switch in the back once or twice then reset it. Finally, do a flood clear start and dry start the car by holding down the gas pedal and starting it a few times. Doing these things fixed this issue.