gauge circuit board

Depending on the level of restoration you are doing, you could just solder wires to the circuit board where the pins went and splice them into the connnector wiring. Replacing the pins and getting them to be reliable will be difficult for someone not skilled in that kind of work.
I will usually set the dash in place and hook up the electrical to check it out before it gets permanently installed. Seems like there is always one more thing to fix or something I jacked up.