The cluster is out, you won't believe what I found

Well here is an update:
after soldering good wire to all of the points, and replacing all of the bulbs, and replacing the voltage Regulator, and testing the fuel gauge (yes it worked but I needed 3 D batteries to get it up to 3/4 full), I reinstalled and what i got was:
Right turn indicator works on the cluster. Nothing else.
So with my frustration, I just ordered the repro cluster for $140 incl shipping.

I want to ask, since the one turn indicator bulb is working, this means I do have ground for the cluster? Right? Or is it possible that the cluster has to have multiple ground points in order for each light/gauge to function?

Any help on the Speedometer?