Hand hurt? Be thankful its not worse (yes it can be). Look at the MSD 6 instructions for how to test. Try not to do a traditional spark wire test with any MSD unless you must.

Ignition power during start uses the wire connected to the coil side of ballast resistor. In other words, it comes from the starter switch bypassing the resistor. IIRC if that's not working with the MSD the MSD isn't getting turned on. Disconnect the battery and check for connectivity between the battery supply and the start side of the ballast (resistance if using a meter, light on if doing it that way). If not, then go to the back of the switch to determine if its switch or wiring.

If you prefer diagrams, here's my '67 Barracuda charging and ignition wiring diagram Your colors may be different but the layout will be similar.