I was told to stay away from those "conversion kits" that just change out the refrigerant from R12 to R134, apparently to use R134 you need a much stronger compressor. My father used one of those conversion kits on his Bronco and it didnt cool at all so he had it switched back to R12.
2003 Volkswagen Golf GL 24,000 miles. 1.9L I-4 TDI 5spd.
1986 300E. 115,000+ miles. 3.0L I-6 1st daily ride, around town only. (Gone)