Carburetor cfm for a mild 318 build

Dan the man said
I've checked out cfm calculator's to see what the 318 would need for carburetor size and they showed around 500 cfm. The car is going to be a semi daily driver, I will be using a dual plane intake that has a maximum rpm range of 5,500. The cam will match the power band of the intake manifold. I'm not familiar with carburetor sizing and don't want to over or under carburetor the engine. Thanks

With a good carb, size matters little. I have run 750 cfm AVS, QuadraJet,s and TQ's on 273's and 289 Fords. I prefer an adjustable Air Valve Secondary carb so you can dial in the secondary opening without buying any parts such as power valves and springs. New, that would mean a Street Demon or AVS2. I have rarely bought a new carb and prefer original high performance carbs rebuilt.