Re: 72 C20 factory air conditioning restoration
You should be able to retrofit modern A/C components to your existing evaporator and use your original evap housing. I don't know the company or how well their systems work. From a 5 min glance at the website link, I don't see any negatives that jump out. I'm sure they have their recommended parts to use with your evap and with modern compressors and refrigerant pressure regulation, it should be a nice addition to the original A/C interior look.
R12 and r134a systems use different types of oils and the oils do not mix. Evap can be cleaned with solvent type of cleaners (A/C system cleaners are available) and should have no problems.
Bob
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