This carb or a Holley 2300?

The 3" depression is the two barrel, 1.5 for the four barrel So, with more vacuum under the two barrel it appears bigger than it really is, compared to a four barrel. The "350 cfm" 2300 holley flows more like 250.
The "1350 cfm" Sixpack carbs flow around 950 if rated the same way as a four barrel would be.