The other issue is that if the original design was 10 to 70 Ohm throughout the arms sweep it was noted that the Ohm reading was 80.7 Ohm and not 70.0 Ohm at full travel down (E). Possibly may only need to adjust the stop for empty ?
The full tank resistance is closer to 74 Ohms. So 80 isn't awful.
Maybe it also matches the later fuel gages @RedFish mentions in this post: Gauge Cluster Issues/IVR
