When my 451" DartSport was running in the 10.02 area with a best of 9.96 in good air I had a 1050 Dominator(quicker than smaller carbs I tried) on it. I switched to an M1 TR with two 750 Quickfuel double pumpers and the car ran in the 9.90 range with a best of 9.89 and it even ran 9.90's on hot days.
I loved the tunnel ram and it was more mellow on the street than any single carb I had on it previously.
The only downside was that it drank twice as much fuel.