Hot ballast resistor & ICM

Thanks for the info on the ECU pins. I will use the Duralast ECU for troubleshooting and as a backup.
I replaced the original coil with a stock replacement. No change in voltage and resistance, but it's good to have an extra on hand.
The ballast is a dual resistor in this car.
The negative battery cable has always been in poor shape, so that'll be cheap to replace tonight. I will clean all grounds tonight and let it run for a bit to see if the ECU still heats up too much.
For the short drive around the neighborhood the ammeter showed that it was charging, but not very far from center. I drained the battery quite a bit from all the testing and cranking, so I will see if the charging condition levels out.