I just got an upgraded front sway from P-S-T (7/8"), and noticed they also offer a rear sway kit which I hope to get at some point. They seem to have really reasonable prices too. Bought all my suspension and steering gear from them for my 66 Ranchero and have been very happy.
If you intend to install one, do a seach. I recall within the past two months, someone discovered their rear sway bar was tearing out of the car and fabricated a pair of supporting brackets to correct the problem. Documented and photographed, it was a nice job and it would be a good idea to review this to avoid what he experienced.
what one Guy I know did...he put the bar on upside down, that way it pushed on the frame, not pull...
I was interested in the innovative approach as a solution. Are you certain you are Certified or is that a self-proclaimation?