Sure, any turbo that will fit on will work, as long as it is big enough to handle the volume of air these engines move.
Basically there are 2 types of turbo's for these trucks. The wastegated and non wastegated.
The non wastegated turbo has all the exhaust pass through the turbine housing, and the spinning turbo wheel is sized accordingly to limit the amount of boost on our applications. These units produce decent power, and increase economy on the hwy. The downside is these units take quite a while to spool up, so have noticeable turbo lag, and only usually high boost at higher rpms. The newer Hypermax units are much better than the older banks and ATS units.
The wastegated turbo wheel is sized much smaller, so it spins up faster and produces nearly instant boost, but can overboost these idi engines real fast so, a wastegate is incorporated to "dump" the excess boost to prevent damage. The result is quick no lag power, but the downside is loss of efficiency and higher backpressures.
So, if you can fab up a turbo, and you have one that will move enough air to keep up with the 6.9/7.3, then it will work. If you use one off a powerstroke or something similar,(it has been done) you will need to limit the boost.
I highly recommend though that whatever you do, you must have a pyrometer in the exhaust as it is really easy to overheat our engines and have a meltdown!
I say, if you have the skills and tools, go for it!!
Zigg
