You will probably have to purchase a four barel intake and then buy an adapter plate to convert from to four to two. I would recomend a smallish dual plane meant for economy. I'm not really fond of the adapter plate idea but it works, why not rebuild a Carter and use it? Lots of two barrel Chryco intakes out there that take a Carter two barrel, for the price of the spacer you could almost buy a used carb and intake plus a rebuild kit for the two barrel carb.
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”
— Han Solo