This might just be something from my sled pulling days but if everyone is so worried about the front shaft failing abruptly and causing damage to the transmission... Why not just install and driveshaft loop? Works in racing...

 

Because you will still beat a hole in the tranny and or t/case.
Why risk it?

 

They probably have more room. The front propshaft is the problematic one and there is very little room to add a loop to contain it.