Everything is working except fuel gauge, but made progress on it. It used to do nothing but read full, now when I start the truck it wiggles a little but is still at full. I will check the ground at the tank but I think it may be something in the sending unit that's gone wrong. I will read some more on here about testing all that stuff.
At least now that that's all wired up I can chase the wires from there to find where my problems are.
Sorry I forgot to take pics before putting it all in the dash.
62' GMC Fleetside 3/4 ton 235 4-speed. Time makes fools of us all.