did anyone answer this, i didnt care to read. GM and dodge used the same calipers so thats a null point to think about, obviously upgrade to the 1 ton stuff if you care. Regarldess youll want a hub from a v10 2500 dodge. they come 8 lug pattern with 3 bolt flange. its phyically has same hub and all that problem is you need to either tap the knuckle or the hub, or, run a through bolt. I through bolted mine with adequate hardware. The OBS knuckle and dodge hub are not threaded so thats one issue. Next up is the rotor, for a half ton situation the rotor is now a larger diameter, it need to be machined down. If memory serves OBS and Dodge once again share the same rotor. Viola its done.
Your other option and i think id go this way if i were to do it again is to go with all GMT800 stuff and do the GMT900 caliper swaparoo.