HEIDTS  ’55-’57 Chevy Triangulated 4-Link Kit is a very popular kit as it does not require a Panhard Rod.

Bars are fully adjustable, 1-1/4″ x  .156 tube with 3/4″ stainless adjusters and urethane bushings, angled and straight chassis brackets, tabs and hardware.  Shown with diff housing, the unit is the bars, brackets and coil overs.