Close as you will come to getting an OEM fuel sender..

@Aaron Tate, that is awesome!

Something to remember is the tank is not rectangular, it has a taper on the bottom and the spare tire recess on the top.

All this means is the angle of the float arm will not be equal to the guage reading per gallon. The float will lower faster in the full to 3/4 range (till it gets under the spare tire indent), then approximately a constant rate from there till empty.

Your plan to use a guage is spot on.

Great work