B&S 12.5 question

hey i was wondering if anyone thinks that i could set up a dual carb with 2 carbs from a 5 hp or somthing, i would be building my own intake but do you thing that will work? Another is what is a good site to find aftermarket motor parts? thanks.

Better idea would be adapting on a motorcycle or snowmobile carb - has a larger intake opening on those type of carbs- better throttle response, more gas flow.

Dual carbs would be better for a twin cylender - one for each cylender.