Yup, that would be pretty important. Otherwise the slider block will limit the travel of the spring as it compresses and that could be a problem. They're supposed to be mounted so the rear eye bolt is a 1/2" back from the center of the track. That's about where mine was when I mounted it, but the springs settled a bit and it sits a bit further back than that now. You can see by the shiny mark on the track though that they don't get anywhere near the rear end of the track under normal conditions. But with the zero arch springs on my car they move further on forward on extension than they do back on compression. With SS springs I would make sure I left a little more room than I did. Of course the SS springs are pretty stiff too so maybe it isn't a big deal.
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