It's a puzzle with no answer.. You can't fit it in from the bottom, because the top of the torque box has to go on top of the frame rail, and the top of the torque box is bent at a 90degree angle.. And you can't fit it in from the top, because the bottom is much wider as to go underneath the frame rail.. I mean, I could hack off the rocker and do it, but thats not really an option.. :) anyone done it before?