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Originally Posted by hotrodhomi
So are you saying that the older system works better because of the R12? If this is the case why are you doing the conversion to R134a? Availability? If you were going to use R134a anyway, why wouldn't you use a system that was designed for it?
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Availability and cost is the reason why everyone converts to 134. And yes I would say that R12 does make the air very cold. That is if you get lucky, the reason I say that is, when I restored my factory air unit it didn't work well, (not like a vintage unit) but on the flip side of that people get lucky with the original and it works like he said, (frosts the windows when you roll them down!!!). I think that is what everyone is looking for. The reason I say to go for the vintage is cost and availabilty, The initial cost may be more but its worth it in the end. They even make a unit for the 67-72s that makes it seem like there has been nothing done. My dad is getting ready to put in in his 68 burb and the total system from venting all the way down to the compressor and dryer will run him $2000. I will ask him where he is buying it from. That may be a little much right off but you won't have to worry about it for a long time!!!