I guess I don't understand your question. If the rack is bolted to the axle and the steering arms are bolted to the spindles and they are attached to the axle, then the whole assembly would be relocated 3". By dropping, do you mean you are using dropped spindles? If so than you do have a problem, unless you can relocate the steering arms. If the rack and the steering arms are not close to the same plane you will have a bad case of bump steer.