Another will not start post...

!!!YIKES!!!

Download the destructions for your Pertronix ignition (Seems like that is what this is?

Make these tests:

Turn key to run. Measure coil + to ground. Should be somewhere from 6ish to 11ish volts assuming the coil resistor has not been bypassed.

With meter still hooked in this manner, crank engine using key. Coil + should read at least 10.5V

If engine will not crank, find out why first. Keep the "bulkhead connector" in the back of your mind. Would not hurt to give it a good "wiggle."

Is this an auto or stick?

If a stick car, the starter relay should have just one "push on" flag terminal. Measure that to ground with key in "start". Should have 12V there. If not find out why. That is one wire goes from that terminal, through the bulkhead, to the "start" terminal on the key.

If an auto, same as above except starter relay has an additonal flap "push on" terminal for the neutral safety switch. This wire runs from that second flag terminal, down the firewall, to the neutral switch on the transmission. Hold the key to start, wiggle the shifter from park to neutral and see if it cranks or clicks

If not, measure the transmission wire terminal on the starter relay, connected normally. With the key in "start" you should have near zero volts. If you have 12, you have trouble from that terminal down the wire to and including the neutral switch, or trouble in the transmission.

NOW!!!!

If the coil readings at the first of this post were OK, considering "unwiring" the ignition so you can "jig it up" simple as possible. Run red wire of ignition module to coil + Run other wire to coil --. Provide power to coil + and crank engine, test for spark at coil tower. If you have a tach connected, unhook it. Make sure there is only the ONE wire hooked to coil--

If this produces no spark, it is either the coil or the module