One wire alternator problem

yes..you do not need or want to use the ballast restrictor with the msd box..

one side of the ballast is ignition 1..the other side is ignition 2....which are start and run...

went you hit the starter ..the coil get it 12 volts from the start side...went the key goes to run...the coil gets the voltage from the other side of the ballast which is around 9 volts to key the coil from over heating.....

you splice those to wire together...so the msd sees the 12 volts on both start and run...and then the ballast is not used..