Edelbrock 1406 secondary venturi cluster

The only exception to the rule is if the carb is too small. Or
If your RPM's are high enough on the primary side only and ready to accept the secondary door openings.

Take another look at the carb's pump shot and timing.
Leave the booster alone for now. There not a part you can purchase seperatly. If you screw it up, your now looking for a trashed carb for parts.