I'm not a carb specialist either but a hesitation on acceleration is a classic example of an accelerator pump problem. The pump isn't providing the fuel the engine needs resulting in a lean condition. Of course that applies only if the problem is always when accelerating. The next time you take your truck out, hold it at the throttle level where it starts to hesitate. If it continues to stumble while not accelerating it's likely not the accelerator pump. If it runs OK after an initial hesitation the accelerator pump is a good candidate.

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