HEI Conversion wiring question
See if this helps.
The first picture is the Mopar basic ignition and charging system.
You will see all three wires (Ign1, Ign2 and the blue voltage regulator wires connected where Mopar put them.)
The second pic shows what you want to do. (just ignore the green arrows, as well as the text at the bottom of pic 1)
At the ballast Ign1, Ign2 and the blue regulator wire all get tied together and the brown wire of the three can still go to the coil +.
The red wire for your new distributor gets connected to the three so it gets 12v and the black wire on your new distributor gets connected to your coil -.