Did you mess with the turbo sizing at all? It would/will go a LOT better with a smaller housing.
Also where it's warmer down there you may want to swap out the tranny fluid from the 5w30 synthetic that GM specs to a good quality syn. 15w/40 like Amsoil Truck/Diesel oil. You could probably even go a little heavier. The NV's were known from brand new to be a little gear clatter prone behind anything except a nice smooth V8 gasser. The TDI makes it that much more noticeable. Just a heads up.
Just some stuff i thought of recently and am not 100% sure I mentioned? ---->
The oil in the engine is Amsoil 5w30 Series 3000 Diesel oil - again, for warmer weather a 15w40 would be better.
I'm sure you noticed the stuff in the back compartments like the bottle of coolant? The coolant is a "G5" spec - do NOT mix anything else in there!
As for the tires - do you know anyone around there that wants them? Cheap?
I am not really sure I need them now but would love a little $$ for them. I thought if someone around there wanted them it would save you the hassle of shipping them, me the costs of shipping and maybe they could give you a cold 6 pack for your troubles? heh heh.