It will make a difference to bump steer probably, but so will the height of the rack, the length of the track rods etc.
Best is to assemble it all with the springs removed so you can raise & lower the suspension easily, then see how much the horizontal angle of the wheel changes with vertical movement. I used a cheap laser pen attached to the hub, pointing forward onto a vertical cardboard sheet, raise, & lower the hub though it's total movement, & mark the laser spot on the cardboard every inch or so. you should get the top & bottom at the same horizontal position, & half way up will be an inch or so away from the car (to follow the movement of the hub as it pivots on the wishbone's.
Center one was used in my case, the numbers are spacer thickness used under the (Racetorations modified TR7) rack
Bob