I had the dash apart to replace all the HVAC vaccuum elements, however, there was no leak in the 1988 wagon's evaporator!

So I'll just wait for the leak.

BTW: since the evaporator and condenser for a R12 and R134a W124 use the same replacement parts, given that I've replaced these parts and have converted to R134a, do I fill to the specs of the W124 R134a label or is it still 80% of the W124 R12 label?

Also, I'm thinking about going back to R12 since I'm moving to Florida. Is it worth it? Can it be done WITHOUT a new compressor

I'd replace receiver/dryer, pressure switch, and expansion valve, flush the system, drain the compressor of PAG46 oil, and hold a vaccuum for 1-2 days, and change out the O-rings back to R12.