On the 67 the printed circuit was stock on the light duty trucks. They can fail, and are easy to replace. Usually the sending units failed before the pc board. What isn't working? If it's the ammeter, there is one small fuse on each side of the radiator. If the temp or fuel gauge, check the sending unit. Oil pressure gauge is mechanical.

The instrument cluster is removed by lowering the steering column, removing the headlight knob shaft and the wiper knob and choke if you have one. Then remove the 6 screws holding on the panel from the front. On the back there will be one connector for wiring, the speedo cable and the oil line.


Fred
52 3600
69 C-10