Carb CFM.. Increase?

You would be surprised how much more or less carb size makes a difference on the dyno.
I have a 289 Ford that's. 030 over with many modifications that made 455hp and 445 tg but I wanted to try three carbs on it. The shops dyno carb made the most power with the numbers stated a Quick Fuel dp 750 next was a 850 Holley that made exactly the same numbers and finally a little 600 Holley do that made 8 hp less cost the same in tq.
The one thing the gyno cant tell you is throttle response and I believe that the 600will out shine the others

Run your 650!