No Spark

Last Thursday i took my 73 duster out for a drive without any issues, I went to start it Friday and had no spark. I threw on a new ignition box and ballast resistor, still no spark. I have tried 3 different coils, ignition boxes, and ballast resistors including the original ones. I put in a new distributor pick up and made sure to clean all my grounds.
I am not sure when this started, but it will now try to fire when I turn the key from "start" to "off". This does not work going from "start" to "run". I am only getting 5.6 volts at the coil when in "run". I ran a wire from battery+ to coil+, but still nothing. I am currently unwrapping as much wiring as I can to find anything that would cause an issue. Any suggestions? something I overlooked?