i know there was a post along time ago on these, but has anybody tried these, they are supossed to really help the flex of the vehicle and i bet if you put them on the rear of the leafs, it would really add to the flex of the vehicle, what do you guys think..?? they are called revolver shackles made by terra flex supenssions i beleive

 

I don’t think those revolver shackles wouldn’t be any good on a big heavy truck. They are mostly for “crawling”