That's a real loaded question. Could be very little to a huge amount. Has it ever been updated from R12? How old are the hoses? I would not touch that with a very long pole
I figured it'd be a pretty complicated answer. Anywhere from $20-$1000 I assume? I'm still waiting for the owner to contact me with all the details. Really wanting this car and I could go without air. My daughter and girlfriend on the other hand...