170cui: One to two barrel?

IMG-20181120-WA0010.jpg Hey. I recieved these two barrel Intakes as a gift.
So now I'm thinking about a carburetor change on my '68 Valiant 170cui.
The original carb is a Carter BBS (one barrel)
I read that the best and easiest would be to put a Carter BBD (two barrel) on it.
But there are some different BBD versions right?
Which one exactly should I take for my '68 170cui...?