Since my CJ3A is 12V, I've never had to worry about boosting it, but that's one of the big advantages of a 12V conversion!

My old tractor is 6V, and if you try to boost it with 12V, you can let the smoke out of the VR.  But there's a trick where you can put 12V onto the starter--on the starter side of the solenoid, so it's isolated from the electrical system.  But this does require enough juice in the 16V battery to provide sparks.  I don't know how I'd get that same trick to work on the CJ3A with it's foot pedal starter, though.  (A nice thing about the tractor, is everything is fully exposed!)

-Paul

That's a cool chart!