Has anyone ever used one or both of these? If so in what application(race, drag, daily)?

WTB 3.9/1 gear set

So the car I picked up a couple weeks ago doesnt build boost. Also the tps can't be adjust to .5v closest I can get it to is .32v. Can someone post a good pic of a nearly stock engine bay so I can see where some of the plugs go that are missing? One is the deleted egr. One sensor is broken off. Just a jungle of wiring.

Any one running it? I found one for sale. Want to go MPI...