OK, after making sure the bolts holding the rear end to the mustache bar were tight, and ordering new strut insulators, I dug into the rear struts to see what was causing my "Clunk" in the suspension. It was only happening when I went over bumps, nothing on accelerating or decelerating. Here's what I found: I replaced the shocks (stock shocks from Black Dragon) when I rebuilt the suspension, after I removed the strut insulator and the spring, I grabbed the shock rod and it rattled around in the strut housing. I don't know how I missed this when I assembled them. The new shock came with new gland nuts and the instructions said to use the new nuts. After screwing the glad nut down there was defiantly some play between the shock and the gland nut. So here's the fix! I got a large washer that fit into the gland nut, drilled out the center so it would fit over the shock shaft and screwed the gland nut on, amazing the play was gone! I added a "glug" of motor oil to the strut before installing the shock, put it all together and the clunk is gone. Repeat on other side. Thanks for the help with the elusive "Clunk" A little advice for anyone who is replacing shocks, remove the emergency brake cable before you start, (this will eliminate having to do it while supporting the strut with your knee), remove the brake line where the hard line hits the body and rubber line (same reason), support the strut with a floor jack and lower it down until the strut can swing down out of the shock tower. On reassembly reverse the process (with the floor jack), when the 3 studs won't line up with the holes in the top of the shock tower put a socket down through the center hole in the shock tower and turn clockwise( Tightening the nut) until they line up, jack the strut back up into place attach with washers and nuts.