I installed factory air in my 84 Brat a few years ago, works great. I did not junk the other Brat untill I knew it was working in mine. If you never had a brat with air before, it is easy to miss something small. When I was done with mine, I realized I had missed a little vacuum devise that raises the Idle when the comp. turns on. It is located behind the carb and looks like a cylinder with a rod sticking out of it. Also, have a professional vacuum down the system and retrofit it with the new type freon. When I was done with my installation, I took it to the Subaru dealer, and they put all new"O" rings, and recharged the system for under $100.00. Good Luck, and stay KOOL.