Turbo boost test says what after the concern? What kinda EBP are you seeing? All the CAC tubes are hooked up, and the air filter didn't get soaked with water laying on the floor or something beside the truck, with the wash kid spraying down the next bay? But it is a pickup, so you could have left the parts in the box (Typically box trucks and cube vans get the stuff stacked under my bench or beside the truck, pickups have the shit go in the back)
Just thinking out loud here...trying to figure out what the fuck went on. You did let the truck run for 15 minutes or so to oil the turbo? Did you pre-oil the turbo before you put it on? They tell you to let the truck run for some time, 5, 10 or 15 minutes I can't remember now, at idle, to properly oil the turbo. Me, I built a pressure oiler, so I don't fuck with that stuff.