ELECTRICAL GREMLINS [OVERCHARGING 440-3]

what makes it worse is I believe its been overcharging its whole life
If it was the radio, fan motors, coil etc would be fried every few weeks.

I googled the alternator you listed and it is a 1 field wire alternator.

This is the photo they show on the website ( red terminal is grounded)
Screenshot_20231125-233623.png

This is most likely what your alternator looks like..

round back alternator cores are in short supply so rebuilders internally ground one of the field terminals of a square back alt.

The blue is a grounded terminal.
the red arrow shows the CUT OFF terminal end ( your green wire is most likely attached to the stub that remains)

Screenshot_20231125-233942.png
This is an alternative method of grounding a square back to function on a 1 field wire round back application. Note the connector and green ground wire.

Screenshot_20231125-233743.png