Yeah, that was one of the first things that I did back when I first got the car. I had some R-12 but, I decided that, rather than chase it if I ever encountered a leak or had to open up the system it was just easier to do the conversion to R-134. Now, it seems like that, was a good idea because, the car has sat since the summer of 2019 it appears that it’s got a deminimus refrigerant leak. I noticed it last fall, the A/C wasn’t cold and oddly the heater wasn’t blowing hot air either. Hopefully, when I flush the radiator and heater core it will get cleaned out as well. I might have to create a smaller loop and try and clean the heater core separately. The heater control valve is going to get a closer look as well but, I need to locate it and remove it and see if it can be cleaned or needs to be replaced. Anyway, I’m still playing the waiting game for parts.