67 dart vs. 69 dart wiring

Three I can think of are:
Ignition Switch changed. I don't know the details.
Horn power and relay wiring changed.
Power feeds through the bulkhead changed. '67 used the Z cavity. 68 and 69 move whatever is on Z (IIRC it battery feed) to J ? cavity.
Also maybe:
Wiring for hazzard and brakes light may have changed where they connect at the fusebox and downstream.
Possible change on the engine side is the ignition run. Drawings show it going to the regulator then the ballast resistor in '69. Hven't verified that since seeing it on the drawing.