Fuel Gauge question

crewchief said
Intermittent reading could be a bad ground. Be very careful about purchasing a new fuel sending unit. The aftermarket sending units are linear! OEM are non-linear, readings at the sending unit (with a good ground); 73 ohms at empty and 10 ohms at full.
I would have the sending unit rebuilt. Here's one rebuilder: Tri Starr Rebuilt Fuel Sending Unit Specialist
Guage work can be done by: instrument-specialties.com

Thanks, but having it rebuilt is not possible - the old one was so rusted through that much of it was gone. Whether foolishly or not, I don't know, but I threw it away more than two years ago.

EDIT: Would it be wiser to buy an NOS fuel sending unit?