Help with JB-8 brake caliper rattle

[old Chevy guy]

I converted the brakes and spindles on my 71C20 to the newer 73-87 style and in doing so wound up with the JB-8 calipers that as you may know use a wedge system with a little spring that looks like a tiny leaf spring to hold it on the spindle instead of the two threaded pins like on your typical gm brake setup . The problem is this ,when your driving down a bumpy road the calipers rattle around and sound like the front end is falling out of the truck. Brakes work great but sound like crap. Anybody familiar with this condition and know what if any is the solution to that. Can't believe I'm the only one who has experienced this. Calipers pads and hardware are all new.