I have a 1977 421C with air conditioning issues. R12 is not available so I think I have to convert the system. Can anybody comment on this and what I have to do to get my a/c working...

Cessna 421

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mdibiase

I have a 1977 421C with air conditioning issues. R12 is not available so I think I have to convert the system. Can anybody comment on this and what I have to do to get my a/c working again??

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