Occasionally, we’ll be asked about a four link installation on a closer-to-stock-ride-height stance. We suggest adding a length of 2″ x 4″ tubing to the bottom of the frame rails where the four link frame bracket will mount, which will usually be enough to level the lower bar and make a happy four link. If you angle cut the ends and box them in, it will blend in nicely. I sketched the suggestion on our handy sketchboard.
This also works well on frames which don’t have as much of a sweeping kick up. Some pickup frames are pretty much straight back from the cab to the rear bumper.