92 van stalling after replacing distributor cap/rotor /plugs/wires and fuel pump?

Sounds like need to recheck all of your work, you may have left off a vacuum line etc. Did you replace the pickup screen for the fuel pump and did you use a factory quality pump? Did you replace the fuel filter as well?

If you didn't have the stalling problem before the work, you should recheck what was done. The first place I recommend checking is the fuel pump fuel and items related to fuel flow. Low fuel volume could cause stalling.