If not useing injection.(injection being #1)
(#2)Webbers would be the best to use Reason being is it is the straights air flow.Or the 3x2 carb setup. I feel my 250 ran better on my intake then it did when i had the dual carb setup. And I feel the reason for this is
That the air flow from carb to head was straighter then the clifford duals. Because the carb sat right over the runners @ straight down to the head/intake port. Hope my 2cents on this helps.}[oooooo]
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NovaMan/Twisted6/Larry