Yes, once all the nuts are removed the pulley can be removed very easily. You can then replace the pulley and studs. Sorry, I misunderstood I thought you rounded the fastener. Once you get the fan out of the way the rest of the job is very straight forward.
2005 SE Off Road: Borla Dual SS Cat Back, K&N Air Charger, CSF 3328 Aluminum Radiator, Bilstein HD's, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, AirLift 1000 Rear Springs.