I'm gonna try my best to work on my buddys A/C on his 3rd gen Camaro. I've converted my 86 truck A/C to R134a the proper way by getting a new compressor and flushing and evacuating the entire system. It's been over 5 years and it works great. He saw what I did and he is willing to get me a 30 pack and a pizza to do his. I have done a few already and I always like getting a fan in front of the condensor. Well, I might as well invest in getting proper gauges. He wants to use a product called "FREEZE-12" which it claims works as an R12 replacement. I'm still flushing and evacuating his A/C system (local shop only charges me $40) but I have a few questions,

Freeze 12 is a blend of refrigerants, Should I get R134a manifold gauges?

Since it is a R12 A/C system should it be R12 gauges, or the R134 gauges work?

I thought the PSI readings on all gauges were the same. If I have 40psi on a R134a gauge, shouldn't the psi be the same on a R12 system? even if there is different type of refrigerant?

Thanks guys

 

yes, pressure is pressure regardless of the material that is under pressure. as long as you have the adapters to use to either connect to the r-12 fittings or convert them to r-134a fittings, there shouldnt be any other issues