As long as your deltas isnt too far apart and the rest of it checks out it including the Oasis report it should be good. You used to have a 6.4L if I remember correctly so describing all the 6oh problems would be repetitive. Also double check to see if there is a lot of rust in the utility body.
Edit: If it was a company service truck, who knows what was done to it. Lots of idle time? Wetstacking turbo? You know the ususal stuff.