Two Ignition electrical questions discovered during MSD installation

Thanks. I actually had not hooked up anything yet. After reading the directions, the FIRST thing I did was to test the voltage at the + coil wire, and I was surprised it was so low. I think I will just follow MSD's instructions and the advice from my FABO buddies and put it in tomorrow. Thanks for the picture.
That's the purpose of the ballast resistor. Reduce the voltage of the current flowing to the coil (and also points on a points distributor). Otherwise the coil gets overheated.

The question I have was about your other test results. Where is the voltage regulator getting power from?
If its not getting power at system voltage, that will cause regulation and charging problems.
Originally it came through the wire connecting to the run circuit at the ballast.
Should look something like this inside the connector.
upload_2019-5-13_18-52-57.png

The Brown & Blue pairing is the other side. Blue originally went to coil positive. You can use it for the MSD 'on' switch.
Brown supplies power for the ignition only when key is in start position.
upload_2019-5-13_18-56-12.png