You can reduce the bumpsteer around ride height but not eliminate it for the whole range of motion if the inner rack balls are not where they need to be.
All you really need is a 12x24 inch piece of mdf, a couple hinges, a 24 inch 2x4, and a couple bricks.
Attach the 2x4 to the mdf with the hinges near the ends of the 2x4.
Remove the coilover, support the car at ride height, straighten the steering, lean the mdf against the tire below just below the center (notch the mdf center if the center cap sticks out too far from the wheel)
The mfd touches the tire at the front and rear. Place bricks on the 2x4 to keep it from moving.
Raise the tire as if you hit a bump. If a gap appears between the mdf and one tire sidewall (front or rear), you have bump steer.
Shim to minimize bumpsteer around ride height. This should also reduce droopsteer around ride height.
No smoke, no mirrors, no lasers but to be fair, those methods can be more accurate though the devil is in the details. I’d say they cost more than wood but I’m not so sure anymore. If all your doing is trying to reduce it, knowing the exact amount isn't critical. Eyeballing works.
Lots of goods comments on the scrub and all. We could make improvements all day but the shimmage is a good start. Looks like the turn signals would have to be moved and custom fender mounts made to go with new offset rims to fix the scrub
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Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS
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