[siguy]

did you get a chance to cheack the lower control arms for wear and movement. I would take it out to inspect each one then just stick a pty bar in there to see if it moves around (if they are after market see if you can get a stock set and drop them in to make sure)

The reason why I say this is I had a set of lakewood control arms that the ploy bushing wore out on the body side which produced unwanted movement and vibration plus a "clunk" noise.