I am selling my NP241 Box for Rocks doubler kit. It is one of the last few that will be made. Comes with the 32 spline shaft. See DD Machines post in Pirate for information. I am selling my rig and do not need this for my new rig. I won't even take it out of the box it comes in. Asking $375 shipped doubler kit alone. It took me over a month to get it, you can have it in 3-4 days http://www.pirate4x4.com/forum/showthread.php?t=456669 I also have a 32 splined input Dodge Fixed yoke Pass Drop NP241 I was going to put behind the box 4 rocks. I swapped in the 32 spline input from another case to this one. You provide the crawler box portion DD NP241 with the same input as your tranny output and you are golden. $200 Shipped for the NP241!! 7.4:1 Low range!!!