Vapor, I've also considered this fix. As I told you, I finally replaced the upper sway bar nut with brand new OEM from Ford. It made things a little quieter, but the problem is still existent.
*Before you buy the adjustable sway bar links, remove the sway bar completely to see if the clunk goes away. Another member here said his clunk went away when he removed the sway bar.*
My car DID NOT clunk like this until I lowered it. I'm guessing the new GT500 upper strut mounts I bought are the old version, and the Steeda HD camber mounts are of no help at all. The original strut mounts removed from my car are the "black stud" version which are the latest, and they were dead silent. I really love the adjust ability of the Steeda mounts, but I may try to install the original used strut mounts to see if the clunking goes away. I've read of another member who's been through everything I have step by step, and the updated OEM mounts solved his problem. I don't mind going back to camber bolts if this darn clunk would just GO AWAY!