I purchased the calipers for a 2010 2500 Chevy last night, so I am committed. I threw together a rough sketch of what I am thinking.
The blue identifies the plate that mounts to the outer portion of the spindle, orange is mounts to the inner, red is the spindle.
Since I do not have my truck; this is not to scale, it should be close though, and I am expecting some clearance problems.
Depending on how far back the bracket needs to be, I may try and eliminate the outside bracket; and use the bottom hole that the steering knuckle is on. It would still be the same concept, just simpler.
Caliper Mount Sketch
