The "conversion kit" you see online is orings and replacement fittings. You can usually get them locally if you are going to use r-134 cheaper, since every LAPS has r-134 stuff on sale right now. I replaced my compressor with a reman unit from advance auto parts, ordered an expansion valve and a dryer from the parts place here (top of this page) and used an a/c oring kit from advance to replace every oring on every fitting I broke into. My car has a slight charge of r-12 left in it when i started, just enough to go fffft when i pressed the schrader valve. I took it to a local sho, who pulled a vaccum for an hour, it held, did a second hour, then I charged with freeze-12 from Diesel Giant. Russell has a wealth of info on his page. I looked at the cost of r-12, the lack of performance of r-134, and settled on freeze-12 based on russell's reccommendation. I haven't been sorry, works good here, even in the summer heat. It's been a year, still works GREAT. Chuck

__________________
2000 C230 Kompressor "Frosty"

2007 PT Cruiser
2001 VW TDI Beetle
1999 Landrover Discovery II
1971 Corvette

Gone: 97 Cabrio, 83 240D, 93 VW Eurovan, 95 Volvo 850, 93 Chevy Astro Van, 77 VW Bus, 99 VW Jetta, 74 VW Bus