Super jealous on the A/C thing!!! I have a black on black 4 speed big block and driving that thing on hot days in Los Angeles even with the windows down is “somewhat less than pleasant”...Enjoy your arctic splendor!!!LOL
The A/C systems do work well on R12. R134 isn't as cold so you don't need the ski googles.
Air temps at the registers with R12 is 34f. Normally with R134 expect about 40-41f.
These cars were designed before rear seat ducting was seriously considered so if you should have an unfortunate inhabitant of the rear seat, expect some complaints.
What happens is that you will turn down the fan because the front will be cold but in the sun the rear is going to be a little sweaty.
They also are going to work better (quieter) with the stock engine cams.
My first two cars were convertibles. I found that the best combination was a white interior, white top and with A/C. I'd drive all the time with the top down and A/C on with all the registers pointed at me.
Black seats needed a good shearling cover to keep you from getting seriously burned from the heated black upholstery. A black top needs a really good insulation blanket. You can fry an egg on one in the sun. They get hot.
White cars do have an advantage.