Congrats...I think you made the right decision. I switched to R134 when I replaced the compressor, o-rings and receiver dryer on my 83 300D and was not satisfied. It worked well as long as you were moving, but in stop and go traffic in Florida it could not keep up. I went back to R-12 and all was well again, even in Miami traffic. BTW, the price of R12 seems to be tapering off a bit as the number of vehicles using it are diminishing. Good luck.

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