Edelbrock carb adjustment

With 9 inches of vacuum the Edelbrock idled better than the Holley. I even went as far as converting the Edelbrock primary boosters to work like the Holley by drilling out the economizer jet and blocking the by-pass so it had only one air bleed controlling it like a Holley and guess what it idled just like the Holley did and worked just like the Holley with 1.5 turns
Again the Carter Design is better but you need to understand why.