If you have the 19.5" wheels the lug nut torque is 165 ft. lbs. In the original manual for our 2001 F53 chassis the torque was listed as 150 ft. lbs. About 2 years later we got a registered letter from Ford with the new torque spec of 165 ft lbs.
If you have a newer model with the 22.5" wheels the lug nut torque is 450 ft. lbs.