vortech pulley swap

it "should" come off easily, and it probably will. mine though, was a PITA. it took a good 20-30 min of slowly prying on it from different angles for it to finally come off. after i got it off i put some anti-seize on the shaft as to help not have that problem again.
 
Do you still have the belt on? You should be able to loosen the bolt, as long as the belt isn't slipping on the pulley. Might have to really get the tensioner tight for that though?