Diagnosing Distributor - No Spark Chase

Ok did this system EVER work? If so, we can assume it's wired correctly. If it did not, I would recheck the wiring carefully. Make certain that when you are grounding the trigger wire, that the coil + continues to remain at at least 8V or so. You might ALSO try jumpering the coil+ directly to battery just to be sure

Otherwise I'd try whatever you can get easily / cheap, coil or ECU and replace one or t' other. Coils for testing do not need to be exact, or grounded. If you can drum up another coil "of of something" I'd try that first.