600 CFM, all I need. Check my math!

I have a moderately modified 340 (375 HP) in a 69 Barracuda with a 4 speed and 3.55 gears. I had a Edelbrock 750 CFM on it, and it ran a After about ten years, the Carb went south, and I replaced it with a Edelbrock 650 CFM Thunder series carb. It is a great carb, and my car runs great. I do not think you will be happy with the 600.