edelbrock to holley conversion

The problem with a double pumper on a street car with an automatic is when you floor it all throttle plates will be wide open whether the engine needs the air or not. The result is a bog. With a vacuum secondary carb you can floor it and the primaries will be wide open and the secondaries won't come in until the engine needs the additional air. Much better for an automatic. If you like Holleys I would go with a vacuum secondary.