I need to do this, on a concrete highway thats fairly smooth, mine rides like a
brick sh!thouse. figures, EC/SB, rides nice with a few hundered LB's in the bed. I've also heared the sulastic shackles help alot with ride quality too.
One of my customers here bought the sulastics first said they helped a little but not worth the $. He said this fix took 80% of it away. I was thinking about sulastics too but not now doing this for a 1/3rd of the price and takes 80% away is what I am doing.