Ecu 5pin's on system ballast 2 slots

67DART273 is right on the money. I had this problem recently diagnosing a no start Road Runner in Kingsland for a friend. He had had several "experts" try and come over and get the car running. All of them failed to use one wiring diagram that I DID use. It was the factory stock diagram for the 74 Road Runner, which DOES use a 5 pin ECU. Once I rewired the ignition for the 5 pin unit, it fired right up after five years. You need to remember,that diagram up there you posted with the orange box is the aftermarket system from Mopar Performance. If your system is a five pin system that USES the fifth pin, it will not run wired by that diagram.