Anyone know the brand of traction bars? Any good?

Speaking of Novas. Back in the day, you couldn't buy "traction bars" for any mopars. That whole pinion snubber and SS springs thingy, really sung in with the manufactures. So to get "traction bars" you would have to buy a set for a '66-'67 Nova. They bolted on with a 8 3/4 rear end and where about 1 1/2" short of the front spring mount.

But they worked very well.