^^My reasoning behind this is that, for ride quality I would think that you would want the rubber on the unibody side to absorb vibrations..if the rubber was on the axle, I would think it would wear out quicker...also I am pretty sure this is how RK has their kits, although I may be wrong.
edit: upnover-good idea on sleeving the bolts...already gonna reinforce the frame.
Zack