Regarding NU, they are a pretty decent team. They lost their first two against weaker competition, then improved. But even though they are decent, Pitt's defense should do well against them ("well" is a relative term here.)
Their best player is their RB, Jackson, who is really good. But Pitt keys on stopping the running game, and does it well. Their QB isn't bad, and their best receiver Carr is a very effective walk-on, but overall, their passing attack is about as lethal as Duke's. Defensively, this is a good match-up for Pitt.
NU's defense is pretty good, but they've not seen the likes of Pitt's offense, and I think we win this one by a couple of scores. This will be an impressive, season-ending win, that will have us finishing well within the top 20.