I strongly recommend buying the SU video from www.ztherapy.com it tells you just about everything you would ever want to know about adjusting your carbs.
Also, search the forums.
Are you sure the problem is in the carbs? Check the point gap, or dwell if you have a meter, and make sure the timing isn't doing something strange around 3K.
There could be many things that would cause this sort of thing, including the fuel pump, so you have a lot of ground to cover.
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