Nope... didn't state anything about insulation. I was talking about if the box is beat up, broken hinges, bent doors, rusted interior. If one goes through the expense of replacing a compressor on an old box like that one needs to factor in the physical condition of the box. Could the box last through another 10 or more years of abuse? If not, replace the box would be the answer for long term.
Just because you show R12 on a price sheet doesn't mean it is in stock. Put your hands on the R12 stock before making any more decisions.
Hydra could be on to something... I said capacity, he is questioning compressor HP.
Anyway... got to get back to work....