[franken]

I'd say don't bother with rear disks. It won't have much impact on braking performance. The fronts are disk already.
What ratio are the diffs? Auto or manual trans? If they're 4.10:1 and a manual trans, I'd think about an NV4500 from 95 or newer. 93-94 if you love the 6.xx:1 low in the SM465