Volvo sells a kit that I bought to convert the AC in my '87, it was actually
much easier than I expected. I did have to replace one hose separately, but
the kit contains a new reciever/dryer, orifice tube, some O rings, fittings,
and a bottle of new oil. I had to remove the compressor and drain it, then
refill with new oil. Remove the old reciever/dryer then flush out the hoses
with solvent and install the new one. Borrowed a vacuum pump to pump it down
then charged it, all in all it cost me about $200 to get it up and running,
still works.
