No Spark - I'm Heading For The Rafters With a Rope

I have been racking my brain trying to figure out the answer to the exact same problem.
Mine is a 1976 Plymouth Valiant with a 318 and factory electronic ignition. Vehicle hasnt ran since 1988. I have checked both sides of the ballast resistor with a test light and key in the on position and both sides have power according to my test light. I replaced the coil and all the while have been getting power to both sides of the coil,and have put in a different distributor,but all I get is a crank and no start.I would be glad if the engine at least hiccupped or at least made an effort to start but at this point I get nothing. I also have no power in the distributor connector wiring. According to a wiring diagram I have seen ,the - wire into the coil should be black with a yellow tracer,mine is brown and the + is black with a yellow tracer. Could these be backwards? What can happen if I were to swap them.Thanks for all the help and ill be watching this thread for answers.

BTW I just went out and checked,and I only have power to 3 of the 5 pins at the connector going into the ECU.
Gotta be something simple since 2 people are having the exact same issue.