I'd run the dual quad with as much throttle body as you can get. You should consult with my friends at the EFISTORE.COM there the best. I'm assuming you want a fast car.

I run a 1500 cfm throttle body on my Valiant on a Indy intake that looks like the B1. I run a 4 inch throttle body with an elbow on the turbo car that's on an older indy Dominator flange intake.
It's hard to over throttle body efi.