That is the reason I made mine, the caltracs would not fit in the spring relocation boxes. After I made mine thay came out with the ones thay have for the relocation boxes. I have had mine in the car, looked like thay should work, but it was mid season and I took them out and thay have bin sitting in the shead ever since. I made a set of rear sliders and thay are sitting around too.
And the car is sitting in the shead too