Fuel Sender Ohms

Your answer makes no sense. How did you get a factory sender into a rectangular fuel cell and get it to work at all, much less acccurately?
The new aftermarket tank is simply sitting in the trunk, before I can drive again I need to fab in a fuel filler tube from the factory fender location, fab attach points for the tank, create a working fuel sending unit and run fuel line. Right now I'm focused on the fuel sender.
I ran both fuel sender tests with the senders out of the tank