The biggest problem with the turbo is the really low boost produces very little power. Each pound of boost will only be good for maybe 6-8whp. 5psi gets you maybe 30-40whp. A bit more than the stock s/c model. Not close to the 300whp you want. At 20% drive line loss(not sure in the X and worse in 4 wheel) you're looking for 360+ fly wheel horse. You'll blow the 3.3 way before you get there. For the amount of custom work, its not much gain. I'd love to see a 300TT motor dropped in an X though!!