what size carb for a 416 stroker

I have Indybrock heads on my 416 68 Barracuda with a Cam Motion 246/250 solid roller and 3.91 gears with a Dynamic 4200 stall convertor. I'm running a Holley 750HP on it that seems to be a good fit for this combo. I also have a 950 HP to try on it but I like the way this 750 HP performs on it.