performance upgraded '75 455 motor

I have a '75 engine upgraded for street performance.
TA stage 1 heads.
TA camshaft
Forged pistons
Offenhausser dual quad intake
Mallory ignition
New oil pump
New fuel pump
Still waiting for double roller chain and aluminum water pump cover and new water pump.
I want now to choose my carburators. I need 2 carburators for the dual quad, for street performance and some drag racing.
Which carburators do you suggest? And how many cfm each one should be? Manual or electric choke is better?

Nice set up !

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