Oh boy... here comes to turbo-a-rs question
I'll say it just once. RS blocks do not like to be t/c'ed. They can run fine on a super low boost for awhile, but they just aren't meant for it. It's a lotta money and a lotta upkeep to make sure it runs decently.
Stock 2.5 has 165 hp, so don't forget how much of that you lose with the AWD driveline and differentials.