what is the best carb for my /6?

Hi guys,
I am wondering what four barrel carb is best for economy and tuning? any suggestions? i currently have a holley four barrel that is way to big i think its a 600cfm...

yea a 600 is to big for a stocker... the 390 or 500eddy is better for your app...

a 600 is perfect for a street/strip or race motor tho...