Hi passline7741,
I tried two new repro sending units from Classic Industries, they were made by dii, both did not work properly. They were shouwing 3/4 when the tank was full, and showing Empty when I still had a 1/4 of a tank.
I installed a Spectra Premium Sending Unit P/N FG104C (3/8 Single Line), from NAPA, this spring and it works fine.
Good Luck, Daniel.