Man, you guys are well over my head with the tech stuff.
The wire harness is brand new from Wire harness of Maine (whatever the name is) and the gauge is brandy-newy too. I will say tho' that the sending unit looks slightly different from the stock one I had before. It looks military but has a different production look than I'm used to seeing. It may be a replacement from a different app.

Randy, PM sent.

I guess I'll drop the tank again but this time I'm going to check the ohms readings before install and wear a mouthpiece and gloves when I put it back in.