Help with MSD 6AL and billet distributor set up

first...you dont use the ballast resistor with the msd 6a.....the red wire that turns on the msd unit needs 12 volts during start and run....if it was converted from a mp box....you usually hookup the two wires on the ballast resistor which is run and start....if you are getting only 6 volts there.....you are going to have to trace those wires to see what is happening...or you can bypass that wire and run new wires to the msd unit...