I am in the process of restoring a 91 alfa spider with 28,000 miles on the clock. It had a engine bay fire and a little bit of body damage. Took care of all the wires so far. Now that I have all the intake side off, I want to tackle the compressor. It had some kind of lawnmower pull cord wrapped around the clutch and looks like it ripped off the red wire for the clutch. Is there any way of taking off the clutch, wihout pulling the compressor out? I would hate to have to evacuate all the freon that is in the system if I don't have to. And if I do have to, what do I have to do to convert it to the new type freon?