Shot myself in the foot, again. In the first post in this thread I talked about being suspicious that the battery cutoff switch was the cause of the starting problem. It turned out to be a few bad diodes in the EMPI alternator, but I removed the cutoff switch prior to finding that out.
Recently, I totally rewired the ECU and engine compartment. In the process of doing electrical work, I added a battery switch back in. In an abundance of caution, I used an 80 amp circuit breaker instead of the old switch.
Since that rewire, I've had the breaker pop on at least 3 occasions. I finally figured out that it only did it when the engine was totally warmed up and I was restarting the car. Aha, 80 amps was borderline when the oil cooler fan was on and I was starting the car.
I got a killer deal on 3 - 100 amp breakers and replaced the undersized one. So far so good. My foot is feeling better until the next unplanned event.
If someone needs a 100 amp breaker and wants it for the cost of postage let me know. I'll keep one as a spare.