Please could I get some guidance with my small problem

Is the AC guide pulley a separate unit, should it just pull off to be replaced? Or is it part of the cover.

I guess that this may have been covered before, but I can not get mine loose (already removed the center bolt on it) and before I damage anything I thought it best to ask.

Also I discovered that the previous Indy stripped 2 of the 3 bolts on replacing the AC belt tensioner. Besides filing them down to a size 9 is there perhaps any other suggestion that I could try please?