Don't know if this will help but I had a '66 Pontiac GTO with the TI ignition system. I started having intermittent engine dying episodes. After checking everything else, I removed the TI module and took the cover off and found a power resistor with one of the leads that went from the body of the resistor and into the circuit board was broken but the ends were barely touching. I don't know how it was working at all but it would start and run until either vibration or temperature or both would cause the lead to completely open. Probably a long shot but if you could find another working TI module to swap out it might be worth it.