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I have a '73 ES with the under-dash A/C unit and piston compressor. It works fine considering it's age, but the last time I had it recharged the technician showed me that the compressor was running at about 65% on it's output (pressure) side. If I need to eventually rebuild/replace the compressor I thought it would be a good time to upgrade to a rotary compressor plus convert over to the modern refrigerant. Then at Monterey that weekend I noticed several 1800s running modern rotary A/C compressors (specifically one called "Abacus 508"), which got me to wondering if there is a unit which is considered the standard rotary replacement unit for 1800 applications.
Thanks in advance ~
Daren
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