Not getting spark

Hi I have a 67 dart with a 360 that has electronic ignition. I am not getting any spark out of the coil. I have tried a new ballist resistor and a new coil and an ecu. I get 12v out of the box to one side of the ballist resistor in run position and get 7v out the other side to pos side of coil. Is there anything else I'm missing? I have tried searching a bunch of threads and have gotten ideas but haven't been able to come up with anything yet. Sorry I am kind of new to this. Thanks for any help.