Start by employing the process of elimination.

For example:

1) disconnect the sway bar on both sides. See if problem goes away.
2) if problem still there remove the shocks. See if problem goes away.
Etc.

Only change one thing at a time and check each time if it changes so you know what made a difference.

What Jeff said >>> Check the adjuster nuts on your tie rods, may be making contact with the sway bar.

Could the frame be cracked somewhere.
Maybe in between the steering box and frame. Or possibly a frame mount bolt is loose. It looks like a lot of frame movement when the wheels are turned. I’ve never videoed to see if the movement is like yours.

Thank you for the suggestions. I replaced the sway bar with a Hellwig 55703. Its a big bar but it fit nicely and wow did it make a difference in how my car handles.. I'm going to do the rear bar.

One of the bolts to the upper control arm (SPC) was loose so I tried to tighten it and it was stripped!! I replaced it with the proper SAE6 nut and bolt and cranked everything tight again.. I know that bolt was fine the last time I adjusted the alignment. Frankly, I'm not to thrilled with these adjustable arms. There has to be a reason why UMI and DSE went with a solid upper control arm instead of an adjustable....

I still wonder if the G body upper control would fit my 69 with a Howe .9 tall ball joint. It's flat, wide and puts the spindle where you want it for best caster..

You didn't say if you eliminated the noise though.

The SPC uppers are designed to use 1/2” bolts to attach to the frame as opposed to the 7/16” OEM bolts (at least on the earlier years). Did you open up the frame holes and use the right size bolts?

So far its been quiet but I'm still not convinced.. That control arm bolt was loose though and that's were the noise was coming from and traveling down the frame..

Good call Northern Cal! But ya I changed them out when I installed them. There was NOTHING in the instructions about this either. I told Mark about it and he noted it..

John got it! It was that bolt next to the ball joint. That was the one that was stripped.. This bolt must take a lot of pressure or the alignment guy cranked it too tight when he did the alignment.. SPC should of used SAE 6 nuts and bolt there though..

Glad you found it!! Crap like that drives me nuts.

What got me was I wasn't sure if it was something dangerous..

X2

One other thing I've seen over the years..... check steering box bolts for tightness and frame area for cracks...

The bolts that go on top of the bushing

What are those torqued to??


Before and after a frame off I get a similar noise only when I back up and crank it hard to the right. Silverado does the same thing

Should the front end be in the air when you torque them or on the ground?
What about the nut for the steering box (arm underneath)

I'm going to do this over the winter. I never liked how that big heavy steering box hangs out there on that frame rail.. I might even get one of those frame supports that UMI or SC&C sells..