64 Valiant IVR test

I haven't done any test yet this morning, but I suspect it may be partially working. I just wondered if a lower IVR output my be causing these issues.
My concern comes from the fuel gauge being non-linear as well as a perceived low and non-linear reading on the temp gauge.
Fuel reads full when tank is filled, but drops quickly to ~1/4 tank in about 125 miles, took ~7 gallons to refill. It does read empty accurately!
Temp runs just at the bottom of the "operating range" and is 180* verified with a temp gun at the thermostat housing and by putting the temp sender in a pot of H2O being heated on a camp stove.
The pic shows the needle positions my wife marked, from left to right, 100*, 150* 180*-thicker mark, 212*.
Again it seems non-linear in comparision to the scale.

Temp1.jpg