Unfortunatly, the Super 5th mounting kits and hitches are not interchangable with the SuperGlide mounting kits and hitches. Of course, this doesn't apply to the new Industry Standard hitches PullRite makes, just the older SuperRail style. This said, you shouldn't have a problem moving your SuperGlide from your short bed '11 Chevy to a long bed '13 Chevy using the same mounting kit. The only catch is the installation instructions on PullRite's website don't list the measurements for drilling the bed. They're going to be about 5 inches off from the short bed measurements though, so shouldn't be too hard to figure out.