Bringing this back up as I am still looking for a solution.

I've put the car up on the lift and yanked/pulled on everything (using hands, crow bars,etc.) with no obvious failures. Pulled off the shock/springs and checked again to make sure the suspension being loaded into full droop wasn't masking anything.

I think Bob has the right idea to have someone drive it and see if I can spot the affected corner.

Would a failed/failing bushing show obvious signs or could it be subtle? Anything I should look for besides obviously torn/loose/missing?

Thanks again for the input.