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The car starts nicely and idles well.  But it bogs badly when accelerating.  I have a fresh Holley 600 carb and when it is swapped in the car accelerates correctly thus ruling out ignition issues, vacuum leaks, and low fuel pressure.  I disassembled the 4300 this morning and thoroughly cleaned it although it looked good inside upon initial disassembly.  The accelerator pump squirts fuel when the throttle is opened.  The choke is set all the way to lean.  I am not sure what to focus on at this point.  Maybe the power valve is not working correctly?

It is the original carb for the car and I am trying to retain it.

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