Hey guys, I was just wondering if there is an easy way to retro-fit an A/C system to R-134A refigerant on an '87 Cherokee, 4.0L? The A/C doesn't work right now, system is empty so the compressor doesn't even turn on, but you can't find R-12 anywhere anymore and to get someone to fill it up with R-12 is very expensive, and will get more expensive if/when I find leaks after they have filled it.

Someone mentioned switching it over to 134A and filling with that to make it easier and cheaper and not such a waste once I find leaks in the system. I have heard of doing this before and thought it was just changing the schraeder valves in the system to accept the 134A, but I'm sure it's a little more involved.

Has anyone ever done this before? I would really like to do it myself rather than pay someone. Thanks.