Well, if you don't have any experience at recharging AC, find a shop or mechanic who will
recharge with R12. They will pull a vacuum on the system, make sure it holds, and add the proper amount of R12, and monitor the high and low pressure with a manifold gauge and monitor vent temps and make sure the system is cooling properly. Y
Other options are pay more money for R134 conversion or find a shop or mechanic that is agreeable to use a blend like Freeze12. You can find R12 cans and Freeze12 on ebay.