The question I'd want to have answered probably cannot be (truthfully). How much towing (or hauling) did that truck do in the first 80,000 miles? If it was run, mostly, unloaded then it should have a long life ahead of it. Turbocharged engines are pretty robust and can last a long time but the more often they are run under boost, the shorter the life expectancy.
Sorry that's not specific to your question, just thought I'd share some reflections from my almost 20 year experience at Saab.