Well here is some good news: all that tweaking yesterday may have fixed the problem. This morning the car started right up and it never stalled while idling or on my way to the junkyard to get some toys. Let's see how it does tomorrow in traffic on my way to work.

Observations:
Smooth and stable idle
No oil pressure fluctuation
No severe vacuum reading losses at the economy gauge
Car accelerates very well
No backfiring
NO STALLING... for now