Thank you, dmsfrr.
Gauge has been intermittent and sluggish to show full after filling the tank. Now it shows empty till a right turn is made then it will read at 1/2.
Going to look at the connections tomorrow, check for voltage , and while there, check the sender as well.
I have the “Fix Your Ford” manual for ‘57 and will take a look at the wiring diagram too.
Thank you for responding. Greatly appreciated.
Test.
PS: I’ll post what is found.