If you space their subframe down 1.5" you only need the same bumpsteer correction, this is not rocket science. Problem you are facing is this amount of drop which requires a lot of bumpsteer correction. My Hinson bs kit drops the tie rod end 1.25" and I hate to think about trying 1.5", that's a lot of bending moment on the parts as there is a lot of force on the steering parts out at the spindle. Good luck with this ... I'd mod the hood and leave the rack alone.
