Leaf spring clamps/straps

Just ran out and looked at that. There appears to be a locating pin through the bottom of the clamp, and moving it forward would put it more toward the bulge in the sidewall. Moving it aft, however, would definitely buy me some room.
It's hard to tell in the pics, but how much would you gain by loosening the clamp and sliding it up closer to the end of that spring segment?

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