The earlier setup has the mounting tabs on the bottom, with the bar ends above it, and the later style has the bar running through the K-frame, as opposed to in front of it, and the tabs are on the top of the LCA, with the bar ends below them. The tabs are about 3" further inboard per side on the later setup. The earlier setup hits the calipers when someone converts to big bolt pattern discs, so I think switching to the later setup will help you.
