Great! glad I could help you! I remember the HUMID dog days of summer in New England. Air Conditioning was more of a moisture removal aid than actually cooling but even that makes a BIG difference. Carrameow, Interdynamics is made in China now and I would not recommend those if anything else is available! I got my set of manifold gauges from Napa and those are made by Stewart Warner! Now I know those are more expensive, but not that much more and they are worth it. you are not going to get the small 14 oz. cans of refrigerant to fit on the suction hose though. you will have to make your own adapter to get that to work, but everything you could need is available at any ACE hardware store and would do the trick. Not All of you guys will need the manifold gauges, but get good ones if you do! A good set will not be hard to recognise. I would go to NAPA, get AMERICAN made parts and make sure you are buying solid brass at the strees points where it matters, like the coupling connectors. Remember, when you retrofit to R134, your sight glass is useless when your close to the fill point. R134 works best when the system fills with about 10% less refrigerant than R12! R12 is going the way of the dinosaur, it is no longer being made and when it's gone it's gone. If your system is not working well on r134, which I hear a lot, it's because the system is NOT put on a vacuum pump for a complete purge and flushed properly! My dash vents are producing temps at 49* when it's 103* in the shade! At the least to properly fill your system, use compressed air to evacuate your condensor and evaperator of old refrigerant oil and you will notice a difference. In Phoenix, the air here is very dry and results will differ with climate changes and humidity. Good Luck and don't cook (in your car that is!) Have a great Memorial day and don't forget to thank a Veteran for your freedom! Many have paid the ultimate sacrifice, with their lives and we own them a debt of gratitude!