I don't have time to find a picture for you, but here's a link to several hundred hiboys, if you look long enough you'll find one that shows a Mustang side steer setup. http://www.carnut.com/photo/list/ford/f32hr1.html

Special note to dangeroustoy, look at #317.

As Tim (ibuildm) says, the mounting is critical to bump steer. My preference is to say MINIMIZE bump steer. The key is to have the tie rod end at the pitman arm/drag link end line up with the four bar pivot point, and have the drag link absolutely parallel with the four bar. Now that's going to be at static ride heighth and steered straight ahead. When the suspension or steering starts to move, those locations will change, thus inducing bump steer. It will be most evident in the process of turning, and the further you crank the wheel, the worse it will get (bump steer that is). That's why you see way more Vega style setups than the Mustang, there's just no way to completely eliminate bump steer somewhere in the operation with the side steer setup.