Stumble off of idle - Seeking advice

My car has a stumble when accelerating off of idle. It is most pronounced when the engine is still warming up and mostly goes away when the engine is hot. It has a Holley 750 vacuum secondary carb. The 351C engine has an Edelbrock Torker intake manifold, a hydraulic roller cam, 1970 closed chamber heads, and dished pistons. I read an article about this at Holley's website and they sort of suggest a larger nozzle for the accelerator pump. Your suggestions to remedy this issue are appreciated.

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11/6/238:30 PM

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