Is the race carb street able. They usally arent. I would go big. 750 dp is a great carb in your hp range but if your going for big power might as well get it out of the way early since you will have to put in tuning time on any carb.
The edelbrock 800 carb i had on my poncho was always too small. Had a holley projection 1000 cfm and it was terrible junk but wot worked. So as long as it was floored it made power. But it was never an issue of too much flow making the engine hit soft down low even with the big throttle body. It was nasty down low. 245 tires were not even noticed by the engine. If it coughed which the projection did all the time it would blow the tires away. Like the car sneezed. Boug-roar-screech
If you had a 1050 dom i would say to run that.