Never assume...the best answer I can give you right now is "possibly".
If you search the 4X4wire, in the Isuzu forums, "diff drop brackets", you should be able to find the discussion between Strawmeyers & Mathew(Matt from indy 4x) on this topic.
PM me if you want me to call Sean & ask him for further details, as I'm not sure of the model year of his Amigo.