Ok so I will take a shot at this only because I have been fighting issues on my 92. Not the exact same thing but maybe something you will find beneficial.here are my thoughts.
You may have a sticky iac motor. They get carboned up and the plunger doesn't react quick enough thus causing Boggs and sometimes stumbles especially coming to a stop. I recently changed mine and was happy with the drivability improvement.
Several years ago I also experienced severe issues with the truck dying. Turned out to be a plenum gasket causing a vacumm leak. This made the computer richen the fuel up so much it would die.
There is a video on YouTube on how to test the plenum gasket using a vacumm gauge. When I found that test was negative, it lead my to changing the ďac on the throttle body.
