[Gustavo Flat 6]

Hello everybody.
I have one e36 subaru engine and I have seen some oportunities to buy a used boxster with engine problems. Porsches are very expensive in my country, also we dont have many...so get a new Porsche engine is not an opition.
Also, I would like to change the transmission to a WRX transmission because it can handle more torque.
The truth is that I am just a 23 student that dont have any experience with car in practice, so I would like your help to make a list of the parts I would have to change to plan it and see it its affordable for me.
I Have seen two or three boxsters with wrx engines but didnt find details like that.
Thank you very much, bye!