1970 GTO fuel gauge level not right
I bench tested the sending unit with the gauge and it goes from empty to full correctly according the gauge reading. (moved the float manually out of the tank)
Problem is I put around 4 Gallons of gas in it still shows empty. It has not moved from 0-4 gallons.
The pickup length seems to be correct as when I pulled the tank out it had about 1 gallon of gas in it and the car still was running before I removed the tank.
My guess is the float arm is not bent-angled properly or wrong length to start moving with that little amount of gas in there.
I bought the correct sending unit from one of the GTO online sources so it should be the correct one for the car.
The tank looks correct but not not 100% sure. is there numbers on it to verify it?
Just wanted verification before I try to start bending the float rod what else could it be or should be checked first.