The 65s used regulator to keep the voltage to the guages 5V.

If you look it up on the Rock auto site open the sub catagory "electrical" and it's listed as an "instrument cluster voltage regulator". If you click on that it will open another window and there will be a picture of it. They are normallly bolted to the back of the instrument cluster.

Although this thread deals with mustangs the same applies to the Galaxies.

Instrument Cluster Voltage Regulator - MustangForums.com