I have a set of Mono's out in the garage that fit an E-body, brand new only mounted on the car once. Iif you want them. $200+ shipping. I will get the numbers off them later today if nothing else comes up.
As for the ride, I was politely surprised. My last set of small block SS springs road like a 1-ton. These ride smoother than any other leafs I have bought new. The big block used to take the springs and wrap them up really hard, broke two pinion snubbers, while the monos with the bars, there is no spring wrap, it just hits...The feel on the launch is very much like a ladder bar car. I have both, and actually drive the ladder bar car more, but both ride and drive on the street very well.