That one's a home-brewed application- - - -look closely at the picture and the brass welds that attach the outboard flanges can be seen. Carbs for the WW II or early 1950s flathead Jeep 4 cylinder engine might be a good choice to run on something like that. The engine would still be WAAAAYYYY overcarbureted, but not nearly so much as with three 216 carbs or something similar.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!