Birth of the Blue Missile
as the suspension goes up and down....IF the tie rod and lower control arm are at different arcs...the tires/ wheels toe in and out. Ideally you want them parrallel, and traveling in similiar arcs
the basic problem when building front steer with the rear steer componets, the arcs are soooo far off that it makes it dangerous. as the front rises on acceleration and drops upon braking...the front wheels are moving (toeing) in and out. It makes the car feel like it is dancing in the front. Most stock set-ups are probably off a 1/2'' or more. That is what made the drag racers that really knew what they were doing in the 60's FAST. they figured out that if the wheels stayed straight...the car goes fast. They would heat the steering arms up and bend them to get the least amount of bumpsteer as possible.
I will mock up and measure the bumpsteer difference between the two tie rod ends (I have both) on my next mock up...within a couple of weeks