Another Carb Size Question

I have a 340 based 373 ci motor that is mainly to be used for the street driving. I used several online calculators and based on a ve of .86% they all say I need a 556 cfm carb. Even at 100% it only at a 647 cfm.

I'm leaning toward a 650 Edelbrock and was wondering if its big enough. I hear a lot of people using 750's on street driven 360's and according to the calculators, they are way over carb. So what size are you using, and with what kind of results?
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