Hey guys, im getting a full original a/c systems from someone this weekend and I want tips or concerns that I might face. First of all, im gonna check the parts and replace what needs to replaced. I know this person complained of no cold air out of the vents and suspects the compressor is faulty. My car is a 1971 Buick Skylark. Here's my questions with the main goal of functionality, I don't care about originality: 1. Who has rebuilt the original harisson a/c compressor and can you tell me how difficult it is, what new parts I need for the rebuild(o rings, gaskets, idk?) and is it worth it or any other suggestions? 2. I want to replace parts just because i want this a/c to be like new and don't want to rip apart shortly after install because of failed parts. I was thinking heater core, expansion valve, the compressor(rebuild or replace). So tell me more items that would be good to replace? 3. I've been reading that people hate taking the fender off to remove blower motor or whatever. Why do people make this seem difficult? You take the hood off, remove fender, what am i missing? Thats all I can think of, I want to hear from those of you that have worked on these original a/c systems and hopefully help me learn from others mistakes or accidents. Thank guys in advance, this is the best forum with good people!