I am looking for adapters for my R12 guages to convert to R134

Propane does the same as R12. I don't recommend it though(highly volatile). Best to convert to 134R. Last time I converted an R12 system was about 10 years ago. I would tell you how to do it, but I could get in trouble because you have to vent out the R12 first. I don't even know of a shop that has an R12 unit anymore. Good for you, they still have the adapters to go over your ports and the 134R today is compatible with the old systems oil. No need to change the compressor, dryer, and expansion valve.

The car originally had R12. If it has not been converted to R134 you would need to have it serviced by a pro or have someone convert it to R134. The R134 fill kit will not fit the R12 fittings.

http://www.aa1car.com/library/retrofit.htm

google really is a friend, 1s hit. and is a very complex subject.

You would need to find out if the system has been converted to R134 or if it is still using R12.
If R12 you would need to have a licensed tech do it, or have someone convert it to R134.

It came from the factory with R12 but look and see if it has already been converted to R134. If not then convert it over the R134 as R12 is very expensive. If it is low then you have a leak that must be repaired before adding refrigerant. It is illegal to add refrigerant to a leaking system.

Anyone can convert R12 to R134. It is as simple as screwing the two adapters on the low side and high side charging ports. Now to charge it you need to evacuate it as you said and then charge the system with R134. The hardest part is finding the way to evacuate and then recharge the system without going to a repair facility.

in 1986 it is r12 but you can convert to r134 which is a ton cheaper than paying for r12 you need a license to buy r12 r134 is right on the shelf at auto zone they also sell retro fit kits with everything you need to convert your system and they work very well

Depends on if it takes R134 A or R12 refridgent. R134A most likley looking around $150 depending on amount of freon the system holds. if its R12 open your piggy bank cause its going to cost you some coin as R12 is no longer in production you have to convert your system to R134A or find a gararge that still has some R12

1993 is a split year, if you have charging ports are a little bigger than the size of a tire valve stem then u have R12, if they are big then you have R134, most all Ford in 93 use R12. In the picture are adapters for a retrofit to R134, these screw on an R12 port, note the large cap R134 cap on the end of the adapter.

You have to have the R12 completely evacuated. This is done at a repair facility that works on A/C. The only thing after that is screwing on 2 fittings to your existing lines and charge your system. Companies make retro-fit kits so the owner can do it themselves. These kits are available at most part stores.