Can Anyone ID This Fuel Sending Unit?

I picked this up at a swap on the way out and didn't pay close enough attention to it. It was supposed to be for the '71 Dart but am second guessing its application. The box it came in (labeled 1A-FSU-00097) is supposed to be a stainless steel 5/16" replacement for the '71 but from memory, it looks not to be the right unit. Des this look familiar to anyone? Thanks in advance.