I had a 67' Sprint 6 with what I thought was a some what unusual rear suspension.

I'm looking at a 67' HO 326-4speed car that has the same set up. It is what I would describe as Factory Traction Bars? I know that Pontiac was very inovative back then, but I have been unable to find any information on any of Pontiac's suspension.
Does anyone know where I might find a little info on this subject?

I'm looking for a 400/4-speed car or an HO car and want to know if this little HO 326 is one I should jump on and not let it get away?

Thanks, 1stgenbirdman - Brett!