I don't know, how useable are dsm's? They constantly break, why bother trying to make power? We aren't shredding gears in transmissions (like shane), we just bust transfer cases and are currently bitching on how completely stock motors don't hold 35psi with twin evo 16g's.
Real problems

.
Billet transfer case housing, stronger non rusted output shaft, front diff upgrade for safety.
Put in a clutch, back to bulletproof drivetrain (within reason).