Look another rabbit hole to go down, the car needs to start as well as charge, so the simple thing to do is buy a rebuilt starter, and then complain that it's crap when it fails in a few months. Let's rebuild the original.
The 930 drive Bendix is the same as a 1974 VW beetle auto stick. .
Source NOS Bendix from eBay
Bosch date code 441 January 1984
Tear it all down
Notice paint line part way up nose, starter was dipped in primer then paint after assembly, that's going to be a challenge to replicate.
Stripped, cleaned, dry fit and warmed gently in the oven to drive out moisture.
Out of greenish zinc chromate primer so I used grey.... Sprayed carb cleaner to clean paint off nose, sort of looks like the dip line originally there...
Get distracted while paint dries and tear down original Bendix sprag clutch. Clean relube and assemble.
Clean contacts in the solenoid cap.
Notice blob of solder on solenoid wire shorting it to housing, I noticed this before assembly and corrected it.
Used a small Dremel sanding disk backed up by a cutting wheel chucked in the drill press to resurface the contacts. Easy once I figured out this was the way to do it.