Nevermind, lets just do it all the same way.

Bump steer is simply the differences in the arcs that the lower control arm creates when cycled, and the arc the steering linkage creates when the suspension is cycled. If these arcs are close to one another, in radius and vertical location, the car will have near zero bump steer. As jos says...these cars do not suffer from bump steer really. Chrysler did a great job of getting the correct geometry in this aspect.
The concept of the heim being in single shear is one that could go back and forth forever. Is double shear better? Of course. On the other hand, I have seen people with the heim spaced away from the steering knuckle 2.5+", in a single shear setup...DEFINITELY not good. If the spacing is minimal, single shear would probably be fine.
Now Im sure everyone will start arguing about whether a heim joint is suitable for street driving...that can go on forever as well.