Are you after the spindles or the inboard steering arms, or both ?
Whilst the xxcr and xx parts are interchangeable, they are not identical.
The original xx had more ackerman built into the steering arms. - They were more L shaped, with no extra holes.
The CR shipped with with an upgraded steering arm set which gave less ackerman, repositioned the drag link further back and gave an optional extra hole to reduce ackerman further. (this setup was also sold as an upgrade for the xx prior to the cr release)
On the outboard spindle the CR was shipped with 25 degrees caster blocks whereas the xx shipped with 30 degrees. - The spindles are sold together with the caster block and I'm pretty certain that a 30 degree spindle gives a slightly different height for the ball stud to a 25 degree spindle.
Hope this helps.
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