If you have a Ford chassis, try moving the sway bar front links to the inside holes. Depending on how the rear sway bar is mounted, you may need to either lengthen the front sway bar links, or have them lengthened. If this does not fix all of the problem, some spring assistance may be needed. You can install air bags, or some passive system such as Sumo or Timbren helper springs. If you have rear tail waging, a track bar on the rear end will fix that problem.
Wildmanbaker