I wish I had followed that advice when I replaced the damper on Truckasaurus. The new one that the parts look up said would fit ended up being too short. I could turn much tighter to the right than to the left, and I couldn't figure out why. I had the truck aligned, checked over the entire front end and found nothing wrong. I was about to replace my steering box when I pulled off the damper on a whim and suddenly my problem was solved.
Lesson learned: If you cannot install the damper with the wheel turned left to full lock, the damper is too short.