Before you go any farther along this path, I'd suggest checking the full range of suspension travel in the rear. From the looks of it, if it moves more than 1.5" total it will probably make contact and either bottom out and upset your riding or crack the exhaust with catastrophic results. Just sayin.
Yes that and many other things need to be checked. Just need to make some equal lengths and see where were at first. Then I can easily add or subtract pieces