[Captainfab]

It sounds to me like all you need is a complete '73-'87 front suspension. Those typically have a sway bar. The C20's and the Custom Camper trucks have heavier front sway bars. For a rear sway bar, the 3rd Gen F-body rear bars seem to work fairly well. I recently acquired a rear sway bar from a mid 80's F250 4x4 that looks like it may work.