I have used a few of them. I used one for the Chrysler sending unit and my 69 has a cell with a chevy sending unit and the correct ohm guage for it. Niether one ever read right.
I went as far as getting the autometer fuel gauge,that matched the chrysler ohm sender that is inmy cell.It doesn`t read right either.I just know if I get about 150 miles on a tank,I better stop for gas...lol