One of Andy’s friend, another rabid Mopar fan, has suggested that maybe the coil is going bad.  Coils are cheap, and easy to replace.  Andy suggested that at the same time I could put in a firewall feed through so that the coil could be mounted inside the car rather than on the motor.  Why?  Because coils don’t like heat.  Keep the coil away from heat, and I’ll have a more consistent bracket car.  Makes perfect sense.  I’m ordering the parts from Summit!