Convert to R134. I have stock components running on R134. Pretty darn cold too. To convert just change all seals, orfice tube, accumulator, and possibly the hoses. Take off the compressor to drain out all the oil too. Preferably just change the compressor when you convert. I have a $99 compressor and it's been running fine for two years now. I changed the hoses because the stock ones tend to leak over time. The new style of hoses have a plastic barrier between the outter and inner sides. This helps keep the freon under pressure and helps slow down permiation. If you change hoses run them together over the engine instead of over the fan guard.
