Yeah, it has the sleeves you need. Thats the same one I used, and I also used their high steer kit. The "sleeves" are those pieces of tube between the plates. You drill the frame big enough for those to pass through, then weld it all in place. It just keeps the sides of the frame from squishing together when you tighten the bolts because youre tightening lengthwise on the tube rather than directly onto the sides of the frame.
The only thing I did, was grind the plates "custom" to make them shorter so I could move the box forward further. You want the box as far forward as you can get it (I cut into the core support and moved it pretty damn far forward). The idea behind this is to keep the tie rod behind the drag link through the suspension cycle, otherwise on compression the tie rod and drag link could hit. I wanted mine really far forward too since after I get new springs up front, they will move the axle forward. So, I planned ahead and moved it far enough forward now for the future springs.
~T.J.
