Leaf spring clamps/straps

I bought a set of leaf springs from General Spring, and they have heavy clamps with bolts across the top. The forward set lines up with the sidewalls on my tires (275 60-15), and they are uncomfortably close. Can I swap them out with the factory-style strap units, to gain some clearance? If so, any idea where I could find them? I haven't called any spring shops yet, as I hadn't noticed it until this afternoon. Besides, I figure there's probably better info and feedback on here anyway.

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