I attributed the rough ride to the 1.12” torsion bars. My Challenger was my first torsion bar mopar and I listened to what everyone told me, that the ride would be rough with those bars. I wanted it to handle well, so I figured that was part of the trade off.
But that was BS, the large bars are fine with GOOD shocks. And KYB’s are hot garbage. They’re just cheap shocks with lousy valving that will rattle your fillings out of your teeth with larger diameter torsion bars.