Reddog1 wrote:
I agree with MORSNOW on your having a front Anti-sway bar. I disagree that it is not needed in the rear. I am of the belief, any SRW will have a very notable improvement in sway reduction with anti-swab bars front and rear. (snip)
I put a Helwig rear sway bar on my GMC 2500HD and it made a very noticable difference in sway.
I also added Stableloads. They reduced the sag but had less effect on the sway. The combination has made my truck quite stable.
I don't think the frame stiffness has much, if any, effect on sway.