the belcrank / choke stuff is an odd one.
i have actually seen some carbs come with reversable or universal linkage to fit different setups. I have one such as this.. but then I seen them NON universal too.. which would make life a 'beach'.
a spendy 'beach' at that.. as they really $like$ them carbs. :)
not somthing you want to guess on when ordering as you say.