I will take some pictures this evening. Rather than using just the arm, I'm going to swap the sending unit. The spring is soldered to the little circuit board.

 

Wont let me upload the other pictures. She is put back together now, I have a fuel gauge again.

 

 

I'm glad your new sending unit is working. My mom used to make those for GM at AC Spark Plug a long, long time ago. Thanks for the pics. I didn't think there would be a space in the white part that you can see the blue part through. Other than that, no surprises. The white part still looks like it's 2 separate pieces but it doesn't matter if it is or not. I was just trying to figure out if someone could take it apart.