My white turbo is 28 years old, is running the original parts throughout, although all the seals are converted to R134a compatible ones and it all works as it should, I do give it an AC service every spring when it comes out of hibernation, but it often has only lost 100 grams of refrigerant over the year, which means it could probably go two years between top ups.
Every year I expect the condensor to eventually start to leak after 28 years of being exposed out the front of the car, but it is still hanging in there.
Blows really nice and cold, on a 35 degree day it can get the cabin down to 18 degrees.
It might not be quite as quick to get the temperature down as it might have on R12, or as quickly as say a Boxster or modern 911.. But then again they do have two massive condensors on the front and no where near as much glass letting in infra red radiation or cabin space to cool.
I never used to be bothered by AC, but these days I would not be without it in the summer or winter, but then again I am getting on a bit
Don't think the gas can make it through the aluminium pipes.. Maybe the hoses which I can believe, but even the modern hoses suffer from this as R134a does indeed have smaller molecules than R12, and even new Porsche require an air con service every two years at most.
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