If you find a sender that works accurately with your NOS gauge. Please post the part number info here. There are many of us that have been searching for years without any luck.
I bought a NOS gauge myself, thinking that might solve my issue. I went through 5 different used original sending units comparing them to a mechanical gauge that I installed temporarily. None matched. I made notes on each pair. I then used a used gauge and went through the process again. Nothing matched. One more gauge and repeated. A used gauge and a used sending unit came close on the mechanical gauge temp reading. It was strange how every combo was different. It convinced me to go with the mechanical one. As much as I wanted to keep mine original, I wanted to make it reliable and not damage my motor.
