Read if your truck has a Dana 60 front axle:
Pull the hub/Drive flange: Remove the 2 9/16ths" spindle nut, there may be a locking ring behind it, slide it out, remove the other 2 9/16ths" spindle nut. Remove the bearing.
Pull the rotor off, be careful not to drag the grease seal over the spindle threads if you plan on keeping it in there.
Good time to repack your bearings, too.
[1983 Dodge W350][360, 315/75R16s, 6" lift]
[1992 Dodge W250][CTD - Auto - stock as stock is]