66 Dart GT HT Whatsitgonnabe?

The connector for the sending unit is shot, though. Are they possible to get a hold of?

The connector looks to be the identical to the temperature sender plug; IIRC the gas wire is blue and the temp send wire is purple. I just pulled a very nice temp sender wire with very nice condition plug from my engine harness. You are welcome to it if you pay the shipping on it - problably not not much since it's so light.