The other day after replacing the steering knuckle and sway bar bushings (driver's side was an adventure...) I took er for a spin around the block on the same route in the video. It still made the noise. However while reversing into my driveway with the wheels cranked, I was able to hear the noise for the first time without compression of the suspension. I had my wife sit in the car with it in reverse with her foot on the brakes while I popped the hood and looked around - and I finally found what it was. On the IP I saw that the pump itself was making contact with the steering box! When I leaned my weight against the block, contact ceased and the noise went away...it is the motor mounts and specifically the driver's side that had collapsed allowing the engine to sway enough the left on right hand turns and especially when coupled with any road bumps and therefore rub against the steering box. Such a relief to find it, and I now have the drivers motor mount replaced and will do the passengers in a few days.

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