1987 A/C Condenser conversion

Has anyone converted their older serpentine a/c condenser to a newer parallel or multi-flow condenser?

My next project, after I finish the interior trim and roof, is to fix the A/C. Since it has been sitting for years and was never converted to R134a I have no idea why it quit cooling to begin with. Was it a compressor failure, lack of refrigerant, bad hoses, etc. I won't know if I have a big project or a simple project til I find out what's wrong.

So I want to consider options before I just automatically put it back with the stock components designed before R134a.

Best case, it holds pressure and just needs a flush, drier, and mineral oil swap out.

Worst case, it needs an overhaul.