Holley list 3667 CFM rating???

Hello, I have a Holley List-3667 and I want to know what the cfm rating is. I did a search on google and figured out it's apparently from a '67 440, but i couldn't find a cfm rating. The other number in the choke horn is 2843151. I also measured the base plate pri and sec openings(both the same)and they're 1 9/16"

Any info appreciated.