Depends on the application. Are you talking about a 950HP type of carb? Those are usually 750 main bodies with the choke housing removed. They are nice carbs but the venturi is smaller than a 850 DP. That might be exactly what you need or it might not, depends on the application.

I'm going to use a 650 HP on my SB stroker. This motor is 427 inches with Hughes Stage III ported heads. Bigger isn't always better and all of that you know.