Awful clunk on uneven right turns

This has been driving me nuts, Whenever I take a sharp right turn or turn right on an uphill or downhill, there is an awful clunk that seems to come from the back end. I have recently installed new shocks, new sway bar bushings and sway bar end links and still cannot find where the sound is coming from. I cannot replicate the sound parked or jacked up. Some of the control arm bushings are starting to show some dry rot but are not visibly worn. Would control arm bushings be the cause of this or produce a sound like this? the sound doesn't seem to be metal on metal but a much lower clunk (unfortunately that is as best as I can describe it) I have checked the play in the rear axle c clips and it is within the normal amount of movement. I do have 1.75 inch coil spacers if that might cause some original parts to be maxed out. Any suggestions are appreciated
Hey , did you ever get to the bottom of this , I have same thing...thanks