Check all the simple stuff first…Powerpack and coil grounds, check them with an ohm meter set on the low scale. You should do the stop switch elimination test also. I realize it is not likely that a partially grounded stop switch would affect just one cylinder, but stranger things have happened. Pull apart those rubber amphenol connections, make sure the pins are not bent and both pins and sockets are pushed completely into the rubber connectors. Do not use grease or oil sprays to lube the inside of the rubber connectors making them go back together easier, this will just create arcing/shorts down the road. Soak both halves of the rubber connectors in rubbing alcohol before reassembly, then they will slide together easily. You could check the resistance of both coils, the charge and sensor coils also. You could also swap coils like Frank prescribes, but this is tough without the amphenol tools or the extension leads. Please do not cut the ignition leads in order to swap them around or do the stop switch elimination test.
Once all this is done, you will probably be ordering a new powerpack I’m sure….But, if you just went ahead and ordered the pack without checking the simple stuff, the problem would turn out to be simple and you would be $100 poorer….