James, it would be MUCH more time and cost efficient to simply reverse convert to R12. Just get a new receiver drier and an o-ring kit. Break all lines and flush them all. If you don't have a flush gun use brake kleen. Blow out the lines thoroughly, preferably with an inert gas, but compressed air if you have nothing else. Rinse the compressor with mineral oil, not solvent.

When you put everything back together distribute the oil in several components and put the r/d in place as the very last step and be ready to evacuate as soon as the r/d is in place. Then charge with R12.

I've reverse converted a number of vehicles with great success. With R12 prices being as low as they are these days, this is a very practical thing to do and will not only save the cost of all those parts, but offer less chances for problems.

Hope this helps.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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