Jack of all moderator, I have a question. My newly acquired project mustang 6 cyl has dealer add on air conditioning. I am not a a/c mechanic but know basics. I want to change up to 134 and not sure…

Jackofall

Jack of all moderator, I have a question. My newly acquired project mustang 6 cyl has dealer add on air conditioning. I am not a a/c mechanic but know basics. I want to change up to 134 and not sure if I can just change connectors? The system seems sealed and no leaks. I jumped compressor seems free. Any info?