I have a 1990 camaro it sound like the bearing is going out with the ac on. My question is: Is the bearing pressed into the pulley? I pulled it apart and it sure seams that way.

 

You can't get it out without bending the thin part of the pulley that the coil faces. You should change the clutch assy or put a rebuilt compressor on it (what I would do).
Nothing worse than replacing a $80 clutch only to have the shaft seal on the compressor start leaking...