Least Shoddy Fuel Sending Unit?

Dana67Dart said

What are your plans for your old sender? Is it OEM?
How did you determine that the ranges were correct?

The voltage of the IVR might effect the full range of the guage but not the accuracy thru the ranges.

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I determined the ranges were correct by knowing the capacity of the tank, and driving it until it reached different parts of the gauge (full, 3/4, 1/2, 1/4) and filling it to full again from that point. It always jived with how much I put it to how much it was supposed to read on the gauge, at least within reason for a mopar fuel gauge. My only complaint might be that full is just a bare hair over the full tick mark, by just a tiny bit.

As for the old sender, it is afaik original to the car, or at least the original style. I plan on replacing the sunk float and stashing it for if the after market one fails or if I get another A body.