Plug-and-Play Wiring Harness
I did my '69 Dart with M&H from Year One. They have a plug and play option for electronic ignition. Requires a 4 pin ballast and square back alternator, but the wiring guys can probably help you around that, but it is plug and play. Some discounts apply when the have 25-30% off. The only wiring that I reused was the dome light and the brown heater wires.