Yes, I use a potentiometer placed in series where the fuel sender would go.
Vary the resistance and look for corresponding indication at the dash (or console) gage.
0 ohms = empty
45 ohms = 1/2 tank
90 ohms = Full tank
I made a handy device that can be operated when sitting in the driver seat.
Large photos,,, you get the idea.
I can Mail you the tester "IF" needed
Jim
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69 Los Z11
68 SS/RS 396/325
68 Los Z28
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