I had a 4 runner with a 2inch body lift and i noticed only one difference from it being at stock height and that was there seemed to be a little more body roll. However you stated its on a p/u, and obviously a body lift on a p/u compared to a 4 runner is completely different when adding weight and everything combined. I personnally don't think its a big deal but if I were you I would wheel it and drive it around and then decide if you want to change it.
