There is a tool you can purchase from many of the Model A parts venders to remove the plug at the ends of the drag link and tie rods. In Bratton's cataloge it's called the Tie Rod and Drag Link Plug Tool, part number 4590.
Used with a 7/8" socket or boxed end, it makes it very easy to remove the plugs with out damage. Just unscrew them like any other nut.
Dan Perla