Charlie Swett

Sorry for being vague, is my first time treading these waters. I have access to(a friend would sell to me) an EJ 255 to swap in, but I'm exploring keeping its current engine and putting some sort of turbo charger on it. I will be doing it my self, well with the help of experienced friends. As for the wire harness, I am comfortable in that area.

I want to turbo my '91 XT 6, I'm looking to get at least 100 more horsepower out of it(145 to 240some). What are my options, what are your thoughts?

It's an 07 wrx by the way.

I have a subaru XT 6(ER27) and a WRX(EJ255 turbo) engine laying around and I would like to put it in the XT 6. What kind of modifications would I have to make? And what parts should I replace? This will be my first engine swap, by the way.