I'm revisiting this with further information.
I haen't gotten to drive the car lately so the battery died. I took a partly charged jumpstarter out and it almost turned over. Thinking the jumpstarter didn't have enough juice, I went and got a fully charged NOCO jumpstarter (for up to 6.0L engines.) I hooked it up and it didn't even light up the dash. This is the same symptom as I had before when it stalled on me. It recranked the first time, but the second time, it went dark. I'll add that when I had it towed in April, it sat on the mechanic's lot until they could get to it. When they did, it cranked. And, it continued to crank off and on for a few weeks for them. They were trying to get it to replicate the problem I had but could not.
They said they checked the fusible links so I will assume they did--I've got a great relationship with them--so if it's not that can anyone think of anything else?
Thanks,
Mark