You didn't specify what transmission you have.

With the 2.7, 5spd & 33's -
4.56's if your truck sees mostly street time.
4.88's if your truck sees mostly offroad time.

With the 2.7, auto & 33's -
4.88's are good all around but 5.29's are better
with the auto's high overdrive. 5.29 gets you close
to the original stock ratios.