Good luck, AwDang,
I had no problems with a 6V Pertronix unit. I ran a clean/good ground wire from the block to the distributor clamp. I always carried an another distributor tested/set with points (in fear of the possible disasters posted here) - I never needed it.
However, I chickened-out, and I switched back to regular 6v points/condenser.
Let us know on your year-by-year experience.
Members here have no problem switching to 12 electronics-gizmos.