Yes, it should help articulation. If you figure that with the bars on, for you to flex the suspension, it is pushing the axle sideways - if the bar's not there, it will just be free to follow the springs, not be forced sideways.
If you do remove them, remember to drive carefully the first time out and see if you feel it is safe or not, especially up front. Also keep an eye on your spring mounts and shackle mounts on the frame, as there will be increased loads on those without the bars in place (they will be doing all the work locating your axle), and they could be damaged / cracked / bent off-road. I have a 4" suspension also, and mine have been fine. Just a word of caution.
88YJ,4"susp,33"BFGMT,9kwinch,homemade swingout,258,999,4.10,weber32/36,GMHEI,one moonguy/wwwthreads_images/icons/smile.gif