Short of a vehicle specific forum, you can try measuring. A body lift will raise the body up and most tire fitment issues are with the front wheels, because of the steering. See if you can find the worst case suspension/steering combination and then carefully measure clearance around the current tire and allow for the larger tire. For example, assume you want to go from a 31x10.50 to a 33x12.50 tire on the same rim. The new tire will therefore be 1" wider on the inside of the wheel, 1" wider on the outside and will extend 1" farther out from the wheel. So, if you had a 1" square block and could run that around the face of the tread and sidewalls all they way around the wheel well without hitting anything, chances are that tire would fit.