Old or New Fuel Sender?

As you can see in your photo, when the float is half way up, the tank wall is set in for spare tire space. the float is half way up, but the fuel level is not. The factory Mopar sending unit is non-linear for this reason. the aftermarket sending units are linear. "Dart67" has been working on a programmable interface to use with the new linear gauges. When it becomes available I am sure he will let us know. It is still a work in progress, and there will be a bonus with his set up compared to the others. :D