I must defend the factory installed A/C on the earlier cars. I have experienced factory installed A/C on both 1972 and 1973 models that worked quite well. The additional condensor forward w/ fan must make the difference. Though I have had dealer installed A/C as well, it was less effective. My current 73 w/ factory air produces 39 degree conditioned air consistantly..............well o.k., not quite that cold at idle. Even though we only experience "warm" temperatures in the NW occasionally, 85-95 degree weather puts it to the test. I also believe that the integrity of the factory system complete with the front protection bars represents the epitomy of early touring luxury.