E58 400 plus HP Dart sport build

I did not remove the old wiring. I bypassed the ballast resistor and used that for the hot to the new dizzy. The rest I just tucked back into the plastic wire loom just in case I ever decided to go back to OEM.
Ok that's why I got the backup plan orange Mopar ECU so just tape hide the unused coil/balast/ECU for later and in the loom. The yellow blue wire Im guessing is the one you tapped into, looking at your photos here.