[olddog]

I think he just doesn't want it to drop from 10 mpg to 5 mpg, from this one simple change.

He likes the look, but isn't willing to take a huge hit on mpg to have it.

From what I have read, the biggest problem with multiple carb set ups is the size of the carbs. If an engine only needs 800 cfm then you need to use two 400 cfm carbs. It's a little harder to find small 4V carbs at the exact size you want. Then tuning them up becomes more difficult, which is the second problem. When propperly set up, I don't see why an 8v set up would be any worse than a 4v on fuel milage, but that is theoretical - not factual.