Have you driven this yet?
I'm curious how the 3.55's play with the really low 1st in that 833OD.
My truck has what I presume to be 2.76, and the usefulness of first is questionable already. I definitely wouldn't run 3.91's behind an OD, and I was thinking 3.55's might be too much as well (act like a 6.xx:1 in first).
I've got 2.94's and 3.23's to try with mine.