gasser parts and brackets will be the wrong offset for the diesel engine.. the belts will NEVER line up without custom pulleys..
the diesel brackets are specific to the diesel..
if you try and use gasser parts, the alternator will be where the pump is..
the a/c setup on a diesel is 100% different than a gasser..
and yes, the v-belts are junk.. but if you go to serpentine, then you also need to add a TDI crank sprocket, and get the crank broached..