I've replaced the tank unit, wire, and gas gauge in my 1974 dodge dart and it...

[Taylor]

...still does not read right. help? When my gas gauge first started acting up it was because of the tank sending unit. Ever since then i have had problems with it. I have had the wire, gauge itself, and the voltage meter replaced. It is currently stuck on empty. The tank unit has been tested and matches the model and tank.same with the gauge and everything else. Please help