I have never had one of these on the truck, but in my opinion, I would not want a turbocharger hanging down below a truck that sees anything but pavement use. The oil lines could cripple you, and the chance of damaging ($$$$) the turbo with dirt, or an impact from a flying rock would be a downside. I would opt for a supercharger if you need a power adder. Maybe something like this?
http://www.summitracing.com/parts/VOR-4GL218-040SQ/