Oh, they have 'em, or had them. 2bbl and heavy as a fat chick iron manifold. And guys threw them away at the first chance they could because nobody wants to be seen driving around with, or riding one...
I mean, why do we suggest to newbies "get a RV cam, that will add a little spunk to your 360" but we never say "Get an RV carb, that'll add a little spunk" LOL