Great job on the IRS!!! Since all of the suspension mounting points for the control arms and stuff just moved inward a little, will you be able to use it all back without modification? If you can, and only have to shorten the axle assemblies that will be great!
Since the IRS frame was shortened 2.0" in the middle, the link lengths and geometry were untouched. As you stated, I should just have to have the axle shafts each shortened 1.0".