When I get back from work, I plan to swap my intercooler over from the standard WRX TMIC to an STi TMIC, would someone be able to give me a few pointers, or things to make sure I do or dont do.

I understand as much as unbolting, undoing the hoses. But is there any lines/hoses that have oil in them, or anything like that.
Anything I need to do before I start the car after changing it over?

Any help would be very much appreciated, Im still learning how to do stuff on my car.

I am assuming that changing to an STi TMIC is not going to be an issue without a tune.? (car is a my02wrx)
I plan to get a tune done soon, but that wont be happening until after I have replaced my clutch.