Adjust the fuel pin and fuel screw. Governor spring is a big help too. Many vendors sell a pin and spring together as a kit. I went with BD at the time.
94-02 WH1C and Hx35 turbos have a smaller wastegated exhaust housings, so they spool real fast.
I did these kinds of mods before getting a pyro gauge... which was fine for just a little hot-******* around. Its difficult to get into damaging EGTs with stock injectors. But if you plan to do any loaded work with the truck, the pyro is necessary.