typersti9307

Hi all looking to do a 6 speed conversion on my sti v5 type r I've seen there's ty856 boxes will all these variants be compatible for swap? There's so many different codes is it just the first five digits that matter?? Can any one shed some light on what the codes mean? Tried searching but I'm desperate for an answer as I've found a box trying to decifer weather it will fit! Thanks Adam