I run two passenger side 2800lbs springs on my 3700 lbs cars. The ride is firm, but very compliant on the open road. The best ride and overall performance on the rear suspension of any Mopar I've owned in the last 35 years. I do have 1" lowering blocks on the car to adjust the ride height to my liking.
In the past, I had used Caltracs & the stiffer 3400lbs SS springs and the car rode like a pick-up with both, and only hooked hard on very smooth surfaces.
Dr Diff suggested running the lighter SS springs, and the results are nothing short of amazing. I do run a set of properly adjusted slapper bars on the car. I know many folks regurgitate the story that they don't work on Mopars, but I know otherwise, as do all the local hotrodders & tuner folks and especially the guy in the Hellcat I beat in a drag race at Willow Springs last spring.