It may seem hard for some of you who didn’t grow up in the ’60s and ’70s to imagine buying a new car without air conditioning on purpose. Today, literally everything comes standard with A/C, but back then it was an option frequently left unchecked due to the cost. Combine the lack of A/C with vinyl seats and a hot humid summer, and driving these cars could become borderline unbearable. Of course, A/C also adds unnecessary weight to anything that might see any track or illegal street time, leaving the most desirable muscle cars purchased without. So what should you do if your car didn’t come with A/C? If you’re looking to do an original stock resto then your only real option is to go with an original factory system. But if absolute originality isn’t an issue, then one of the aftermarket systems available can offer some advantages, and this can be true even if your car had factory air. Muscle Car Restorations has installed a number of A/C systems in the last 30 years and unless originality is an issue, they definitely prefer aftermarket systems like those from Vintage Air. Yes, factory systems can be retrofitted to use R-134a instead of R-12, but the new systems are engineered for...