My rear axle has already been upgraded to 31 spline, only the axles will need to be swapped. Going to be doing a complete cobra brake install, fronts (w/ 94 gt spindles), rears (w/ North Race brackets), 93 MC & booster, as well as M.M. stainless lines. I have already purchased most of the parts, and the rest will be here soon. Just wanted to get an idea of what this job would cost if I give it to a shop to do as opposed to doing it my self in the back yard.