I am revisiting my random stall problem after driving with this annoyance for a while.
Based on the thread posted here below, I believe a dirty/old and/or stuck EGR valve is my problem. A eureka moment: Thinking back, the stalls happen when I am coasting downhill (aka coming down off a bridge) or when I coming to a stop. The reason I have been able to deal this potentially dangerous situation so well is that I am often at or near a stoplight so I can just throw it in neutral and restart-- and that fails, restart in P. So far -- knock on fake dash wood-- the car has always restarted.
1994 Olds LSS stalling randomly, P1406 code - !!Fixed!! EGR
I am going to try to clean it first, if that doesnt work, I will go to a JY. Not ready to plunk down the cash for a new one just yet...