Dual 2 bbl or 4 bbl carb intake

The biggest factor in the power dept is the cam and compression.
Since either of these two combos will supply adequate air, chose whichever you feel you can tune and maintain.
As for me I would go 2x2 just for the cool factor.Unless perhaps if your running a ManualTrans. The M/T wont play well with non-progressive 2x2s. Now if a 3x1-progressive was on the option list! Id go for that,hands down