73 Valiant R12 AC system pressures

Im getting a fluctuating low side. Here is video of the system running, sorry for the bad quality, I was trying to give it some throttle while recording. Temp outside is 85 with 21% humidity now.


Is it charged? does it cool? Is the compressor excessively noisy? You're good. Silicone dampened gauges aren't as steady as the liquid filled gauges. What is your ac duct temperature?