Steve, no he didnt say much about the conversion process since it was already done by previous owner. I talked to the alum. welder in town, I have to remove the hose and take it in for welding. He has done many of them. The R134 that was in there has already leaked out now, so I do have to drain the oil before removing the hose. The welder, who used to be a GM a/c tech, said to refill the system one more time but also include some special dye they have, when it leaks out it will be very obvious where any leaks are in case there are more. No sense in fixing one leak, only to have more appear later. Guess thats a good idea.
Ive read about replacing O rings, some valve and evacuating the R12 and oil, drying it out, replacing with new oil, new R134 and presto. Im certainly no expert on this a/c stuff but seems others have done this work in the garage. Here in Minn. law is easier I think. We can buy the R134 at walmart and recharge our own. But any work on R12 seems to be with the license dealers with evac equipment.
So, off for a dye test now.
69RS 350/255 LM1,TH350,Dover White,Blue Vinyl top
F&R spoilers,pdb,ps,am/fm,4.10 Posi.,A/C,
fold down rear seat.
My RS www.brainerd.net/~knudsen/69RS