I am experiencing some aggressive front end vibration intermittently. It appears to worsen with load (A/C etc.). I just crawled under and took some video of the SADS couplers and would love to hear the squad's opinion. In my other thread looking at swapping over to R134a refrigerant, @man_btc noted he thought it could be the A/C compressor causing the issues. I think my inspection makes me lean toward his diagnosis.

Video of the SADS couplers:
https://youtube.com/shorts/uYSBEMU6C...6LoRxqb3dMca2t

Here is the engine running with A/C off:
https://youtube.com/shorts/PXnkwxMjz...SRo5MXDbbRzZtB

And A/C on:
https://youtube.com/shorts/xJEBUdnqY...F1Chbcu5qPrwo0

Honestly, it feels like it shakes a lot even when the AC is not turned on. But that could be from several things. I think the couplers look like they were replaced on and I doubt whoever did that took the shaft and had it balanced.

Questions:
  1. Has this SADS already been upgraded so I can just replace the couplers? (the 1992 version original required a full SADS shaft assembly replacement)
  2. Do you think the condition of these couplers is causing my vibration?
  3. Does it make sense for a bad A/C compressor to cause this much vibration?