It might be worth a shot, but I haven't found a fool proof way to fully silence them. It's a shame because I really do like how they ride, but it sounds like I'm driving a sherman tank down the road sometimes.Great post - very informative.
I'm about to go though the same process. The racket is wearing on my nerves. I put the OME HD leaf packs on my Frontier a couple years ago using the OME poly bushings and greasable shackles. That may have been a bit of an overkill. I notice you have the stock rubber bushings. I think I'm going back to those as well. and maybe even stock shackles.