Are you sure that you have the correct power valve installed. The wrong power valve will give you a bog upon acceleration or just about anytime you hit the gas.
How To Tune The Power Valve In A Holley Carburetor
The accelerator pump also is designed to stop the engine from hesitating, Holley makes a variety of accelerator pump "cams" for different CCs (shots) of fuel and at different rates of flow:
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