What are the spark plugs telling you? You can read them like a book. The bog on acceleration can be caused by too rich or too lean condition while the secondary portion of the carburetor is doing the work. Idle mixture setting does add to the big picture while the throttle plate is open, but the impact is minor. The secondary jet's job is to provide the proper fuel delivery during acceleration. The accelerator pump adds a squirt of fuel to fill in the gap when transitioning from idle to full throttle to prevent lean out.
A warped carb will allow fuel to leak into the intake manifold and puddle up causing a bog situation.
The spark plugs will tell you if you are getting too much fuel, or if not enough.
Having said all of this, listen to HRL about checking every component before you dig into the carburetor. It is almost always "never the carburetor".
Even if it is the carburetor, you need to know that everything else is right so that you are not chasing 2 gremlins at the same time.
Carl
