[68Timber]

You removed a 4" lift and put factory springs back on didn't you? Did you replace all the spring and shackle bushings front and rear? The front shackle bushings are bad about egging out in the frame, they're not doing much at that point. The rear shackle bushings harden and the bolt can rust to the sleeve in the bushing, all that slows the shackle movement down and contributes to a bad ride.