It's too hard to manage a twin turbo set up. What engine management computer are you going to use? What are you going to do about the compression? What about the other components like the fuel pump, injectors, ignition system, exhaust. There are too many components that need to be replaced or upgraded to control such a set up.

How do you plan on offroading in a truck with turbo lag in the lower rpm? Crawling requires low end torque and smoothness. Imagine trying to crawl up a wall when the boost kicks in. The reason most trucks use superchargers is because it's power curve is usually linear. Not a good idea, too much money and you'll always have problems. Why not just replace it with the VQ and have 240 ponies? It would be a lot easier, less expensive, and more reliable than TTing your X.

The heat thing is no joke, my Supra's hood is beginning to discolor from the T04 that I put in it.