How I solved my 1974 Duster fuel gauge problem.

I’m not understanding what it is the took the correction. The sending unit or the gauge or exactly how it was corrected.
MeterMatch allows you to mix and match different gauges and senders, or to make gauges more accurate. It can be used with many gauges that have resistive senders - such as fuel, oil pressure and temperature gauges. In addition, it allows you to have low and/or high set-points that will trigger a bright, blinking, LED indicator to alert if the gauge exceeds normal values.

It is housed in a small (2.4" x 1.85" x .93") enclosure that can be located behind the dashboard near the gauge. Wire connections are made via a screw-terminal strip inside.