Have some questions.

You stated at the outset that you want to street drive the car. Use the smaller carb, its manners will be nicer for regular driving. If you want more power put a bigger cam in it. The 340 cam is a great piece, but like others have said I'd guess your motor will make around 300-325 Hp at the flywheel. Youve got gears - (373's) so why not run a bigger cam, and a 2500 stall converter ?