Fan Pulley Issues

After previously getting the timing belt on and reinstalling the water pump the next logical step was to bolt the fan pulley and clutch. They simply attach in-line using the four stud posts on the pump. However when I put mine on I found that the pulley doesn’t quite clear the timing belt housing and rubs on it at a couple of spots. Looking at the old housing I saw significant marks from this rubbing so it’s not new, but I’m not sure why it’s happening. Perhaps the water pump shaft is bent over so slightly? Or the pulley itself is not even? I’m not quite sure yet. Before I continue putting things back together I should figure this out.