Help With Carburetor selection, Please.

Which 2bbl would you use? The holly 500cfm? or a different one? I'm planning on getting a new intake manifold (I would actually like to get that aussie intake) and new headers but yes my main priority would be the carb and cam set up.

I would use the Holley 350 cfm carb. The barrels on the 500 are a little too large to get a good signal for low speed operation, with street gearing and a torque stock converter. You could use the 500, but I think you would be happier with the 350.