For power you need fuel and air. Much bigger injectors and you will need a bigger turbo. The stock tc isnt rated for much. I used to have real bad shudder in mine in reverse at anything over an idle. Now I have an ats tc in it. Its pretty good. It can spin the wheels on dry pavement in reverse and not shutter. Mine is a 92 250 4x4. Its currently in pieces building for a sled puller. Take a look in the 1st gen section here, I know there is a right up on how to mod your pump.