There's next to nothing camber wise in it between the 3 types of 2wd hub, the std sierra 2wd hub can be used without any problem at all, the area at the hub around the strut is solid on the cossie 2wd hubs, whereas the std 2wd sierra is sculpted out so ultimately not as strong but I've never known one break, that's the quickest way of telling.
The 3 door hubs(although 2wd!!) have a different TCA to hub fixing using a castle nut as opposed to a through pinch bolt as on the 2wd cossie, the std non cossie 2wd hubs are the same as the 3 door hubs fitting wise.
The geometry of the 3 door hubs is very different, as these had majorly less castor, and there were other changes to these they make the turn in a LOT better but a lot don't like them as it makes the car twitchy, ford actually recalled as free a lot for owners that complained of this, so there were two different front arb on the 3 door, a H13 and a H14, the H14 was the modded one with more castor, moving the wheels in the wheel arch slightly.
A decent set of 3 door hubs are worth around £250, but if ultimate handling using oe parts is your game worth getting imo.
tabetha