Again, donning steel pot and hunkering down for incoming ...
What seems to be missed in these conversations (IMO) is the fact(s) that you are dealing with quite an outdated mechanical charging system. First, you have to have a GOOD battery fully charged. You then have to have a GEN that is putting out specified AMP at whatever RPM spec calls for.
The mechanical VR has to be AMP rated to the AMP output of the GEN. These are mechanical units and have to be adjusted for proper output. In the old days ...
... charging system performance was checked usually twice annually (temperature change) and adjusted.
There is no plug and play with these old systems. Usually, the blue VR is STANDARD IGN which had a good reputation. Do not buy off-shore.
We return you now to regular programming.
W (BY GOD) V - EASTERN PANHANDLE