I purchased this car about 4 years ago, and the ac was not working. The car runs like a champ, the body is extremely clean. One of the best cars I have ever owned. The question is now, I need to find a reputable AC tech, as the summers in NY are pretty hot. Shall I convert the AC system to 134? Is it easy to convert the system to the new refrigerant? Is it costly? Does anyone know of a reputable AC service center in the NYC metropolitan area? Thanks a million!