We started getting the rear rail mocked up where they want it to go... It really requires minimal cutting to get it installed. But... we are after a lower ride height... We decided to raise the rear floor and rear rail up 2". That would give a a 5 3/4" ride height.
Will the 2" mod allow the IRS full travel or are you going to have to make further modifications?
It will be close, we may need to modify the outer wheel well. The factory outer well almost immediately starts curving in... making it hard to tuck any tire.