I have owned fords and my dad has a dodge and a friend of mine has two dodge trucks and all i hear from them is how they have to fix this or fix that......
I have never heard anything about having to fix a Cummins.....THEY ARE TOUGH!
I also think dodge might use pretty good drive shafts because i have seen(not participated) dodge trucks pull against ford and chevy and the ford and chevy always break a driveshaft (usually the front one). And yes I know pulling like that is abuse beyond reason but it is a REALLY fast way to find out what you want to know.(and expensive when a front drive shaft decides to swing up into your engine compartment) I think if you are going to put any angine in any vehicle, the parts in that vehicle had better be able to take more than that engine could ever be capable of putting out. I would use a cummins, but i am not sure what i would put it in.....maybe a homemade BOX TUBE chassis with an aerodynamic body custom made for it.