390 cfm vs super six

UPDATE
I'm really liking how much more power I have with this 500 eddy Avs. I ended leaning the secondaries to .86 jets I left the primaries alone. I'm getting 18mpg street driving but I know I can do better. I'm going to enrich the metering rods up. Hopefully that helps cause I'm getting signs of it running lean mixture at idle. Keep you guys posted.