Troubleshooting 73 Dart Slant 6 not starting.

Hi. I didn't get any sparks out of the coil. I traced the wire from the - side of the coil to the ignition control module with my ohm meter and it Read 0 ohms. I then placed my voltage meter on AC and monitored it to ground while cranking the engine. The meter read erratic voltages which told me that the ICM was pulling the - terminal from the coil to ground but there was no high voltage coming out of the secondary of the coil. This told me that the coil was bad and it was. Cheap fix. I went ahead and replaced the coil and it fired up. I ordered an ICM and a ballast resistor module just to have them. Thanks for everyone's advice.