Updated.....

1996 Astro Van.  cranks, good spark, good fuel, may idle, but falls on
its face when throttle is touched (like it is starved for fuel).  Once
you get it to actually start & idle, it idles fine & will crawl around
the parking lot in gear without problems.  But hit the gas, and it
will gasp for fuel & stall.

If you crank it over & over, it will not start.  You need to bump the
key over & over to get it to start, or else it will flood.  Will not
start in "clear flood mode"

Replaced:
---------------------
Fuel pump
Fuel filter
Fuel regulator
Fuel Injector spider assembly
Fuel pressure, tested very good
Coil
Electronic spark control
Wires
Cap & Rotor
Spark plugs
Firing order checked 4 times (it will idle smooth as well)
ECM
TPS
Cam sensor
MAP sensor
MAF sensor
EGR sensor
Checked for vacuum leaks around the intake.
Removed exhaust converter to check for blockage

I am at a loss of what to do next.  Anything that could affect the
running of this truck has been replaced (as far as I
know)

On the scanner:...  No OBD2 codes or faults.  Everything is within
parameters.  No exhaust restrictions, no intake restrictions.

It sounds like I'm missing some other fuel control piece that may be
the answer. Something is not telling the fuel to release above an
idle.

As of now, the dealer is baffled.  The only sensor that has not been
changed is the Idle Air.