Lots of good information in this thread. Thank you. So from what I see there is no direct cooling performance improvement with the Sanden compressor or other little aluminum compressor with either R12 or 134A. The A6 as I mentioned is a big heavy beast, but looks correct under the hood. May have a front seal leak at some point like they all seemed to do. So a restoration grade car should probably continue to run an A6 and all others should balance the cost, weight, and looks factor and choose whatever they want. I am just seeing more and more Sanden and other little aluminum compressors on muscle cars even on the show fields. Judges don't seem to care one way or another at multi-brand shows. Good to know.
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