I ripped everything out on my 64 Riviera after spending much money and time trying to get the original system to work. I replaced it with a complete Vintage Air system, evaporator, condenser, compressor, lines, dryer etc. Now it is so cold, it could be used as an ice maker.
I have also spent the time to get my EPA certification and have the tools and knowledge to have been able to repair the R 12 system on my 1960 Electra. It also blows ice cubes. I replaced the condenser on that with a new cross flow condenser after finding leaks. Luckily it was fairly easy to do as the A5 compressor is not easy to find or rebuild.
It is a learning experience to try to fix any of these old systems but also lots of fun once it works.