I am looking to get an 81 FJ 60 and in the one I want the AC doesn't work. The guy says that it sound like the compressor turns on but it doesn't get cold. He doesn't know what exactly the problem is. If I got it I would want to get the AC fixed. Would I just need to recharge the freon and if so what kind of freon would I need? I heard it took an older kind of freon that is really expensive, does anybody know?