Bed stiffener measurements needed

So in the process of building my giant sliding kayak drawer, I have determined the best way to mount the back is with a set of bed stiffeners. Front is held in with giant turn buckles.

But I need some measurements from a variety of brands that fit the criteria of what I need.

I am using 1 inch box tube, and would like to have the edge of the box tube right at the edge of the bed. I need stiffeners that have a lip on the back edge, but also have at least 1 inch of clearance between that lip and the tailgate.


I am looking at the cali raised ones as they look the closest to what I need.

Orange line would be bed stiffener, green lines would be 2 bolts or or pins.