Lower control arms help needed.

One of mine on my Barracuda was tight too when I rebuilt the front end. I soaked it good with penetrating oil to get it moving a little. Still wasn't as smooth as the other side. I finally drove a chisel between it and the control arm (carefully) to give them a little extra spacing. That loosened it up to be more like the other side. I then welded a reinforcement plate to the bottom to hold everything more rigidly.