I had a similar problem. My car suddenly didn't want to start anymore.
After some searching I found out that i didn't have 12V at the coil (Petronix Ignitor 3 with Flamethrower 3 coil). After fixing that the engine still didn't run but backfired. The engine itself was fine with good compression.
After several months and a lot of ideas that were all wrong (including changing the Ignitor module, plug wires, cap, rotor, plugs...), I finally decided to get rid of the pertronix completely and changed to a used Mallory Distributor a friend had lying around. Car started immediately and runs without issues.
Last time I ever use Pertronix.
Funny sidenote: with the pertronix my tach never worked properly, despite using adapter boxes etc., with the mallory it works fine.