I did that conversion, you do have a little problem finding some headers that fit, and you gotta just swap the engine mounts from an excursion (or any truck that has the 6.8) theres also turbo kits, i bout one and my 10 pumps out about 900 horsepower in my 92' fox, pro street and dirty!
its got a viper heads adapted by john kasse racing engines, due to the fact that it was the only reasonably priced head for a 10 that could take that kinda power.