Bad voltage regulator?

Joey4speed said
BTW, I wouldn't rely solely on the dash Ammeter to determine if your battery is charging properly. Best to use a volt meter across the battery.
Good luck.

Good advice.
The ammeter shows battery and charging and discharging.
But when thats not acting normal, its worth measuring voltage produced at alternator and the voltage at the battery. That plus the ammeter can reveal alot.

Bill Crowell said
However, when I tightened the ammeter connections, the oil pressure gauge and the temperature gauge started going off the high end of their scales

It's possible somehow the IVR was bypassed by something you did. '62 arrangements may be a bit different than what we see in later years.

Need to check the wiring diagram in the FSM but wire G5 may also feed the IVR