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: JBA LT Silver ceramic coated headers, Cajun B-Pipes with Heavy Metal Cats, Borla Dual SS Cat Back, Uprev Tuned, K&N Air Charger, CSF 3328 Aluminum Radiator, Grille Craft Upper and Lower Grill, Burtman Rear Air Reflector, Manik SS Nerf Bars, Nissan Tow Mirrors, Bilstein HD's, Moog 81085 Rear Coils, AirLift 1000 Rear Springs.