if your 10-bolt is 4.30... why not get a later model D44? you'll have no problem finding that ratio, disc braked, with LSD? and won't have to regear your front end to match. The small jump from 4.30 to 4.56 is hardly worth having to tear into the front IMHO. I'd rather have the parts available of the D44 as opposide to that extra .26 in gear reduction.

I doubt you'll find the D44, drum braked, 4.56 with LSD. these came out of the base model 2wd Rodeos, which I gather are unlikely to have an option like LSD.

-Rob