Over 50 years of dirt, rust, and sludge are sitting at the bottom of that old gas tank.
Running your tank dry could put that filth right where it hurts: in your engine.
While cleaning the tank will solve the immediate problem, the real solution is these original design gas tanks.
These tanks have all the correct details, including the threaded sending unit mount and mounting strap depressions.
Danchuk # 2100 will work for any 1957 classic Chevy except Nomad, wagon or sedan delivery.