I have a 1994 Chevy truck. The clutch on the a/c just took a dump and locked it all up. Would u guys change compressor and of course have to recharge system. Its $129 for a remanded r4. Or pay $85 and install new clutch and not have to recharge system? Or I can get a junkyard unit for $25. I have to have a/c for my oldest because he doesn't sweat. Its my work truck if that matters. Thanks for the advice.