darn, Greg. This is a holiday. Not a day for mathematics and physics.
Yes, the inside points that you mentioned are my 2nd approach - I'll go for the heater blower feed because it is the closest and easiest to reach. What do you think about attaching to the ARM lead on the Voltage Regulator?
Here is one instruction that I have found through a web search: "The proper place to hook an electric choke is the 'Stator' lead of the alternator." Is that functionally the same as the ARM lead on the voltage regulator?
Tim