Originally posted by DennyW
Robot, that is the standard, to use the 134a retrofit kit. Comes with the oil, charge line, and freon can. I'm not sure about this year. Last year, I installed a dash unit in a friends 66 Mustang, and I believe I was asked for my MACS Card. Varifying I was approved to do AC. You might want to check that out in what ever your state, to be sure.
In NY you can pick the R 134A retrofit kits up at any auto place, including Wal Mart auto dept, for like 30 bucks, they don't question a thing. My dad used 1 on his '83 Mercedes and it worked for a year, it now needs recharged but, they sell recharge cans for like 10 bucks for 2 or somthing.