Well, fortunately the car has been running great since I got the PS pump replaced. It's nice to have a car with working A/C(my old firebird had a broken compressor). But I have a question, I'm probably going to be charging the system soon, since it works great, but feels like it could use a charging. How do I know if it has been converted from R12-R134A? There are no stickers anywhere, but the valve where you inject the refridgerant looks like the one on my mom's 91 LS400. So i have this question. Do an R12 and R134 system have the same valve? Or was the person who came up with the R134 A/C system at least smart enough to use a different valve so that you can't intermix the refridgerants very easily? This would be some handy info. Thanks in advance for the help.