Air Conditioning R12 System Maintenance

It's that time of year again and it's super hot driving to work. The Aspen doesn't have AC, which makes it nice and roomy under the hood and the nice floor vents provide a cool breeze with the window cracked, but my Gran Fury doesn't have floor vents and it's obnoxiously hot in the summer. I want to see if the AC will still work but all the R12 appears to have leaked out in the 20 years since grandpa used it last. I need some equipment to test the system to see if it has a bad enough leak to...

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