Lots of people remove the idle control module because when it goes bad it causes problems and the engine can run fine without it. When you remove it you need to make some slight adjustments to the timing. If this was done by the previous owner and the motor ran well before you had this problem I wouldn't worry about it. Before getting into the carbs did you make certain that you were getting spark on all cylinders? Stators have low speed and high speed windings so its possible to run ok a higher rpms but poorly at low rpm. I had a similar problem earlier this summer and wound up needing a stator and switch box.
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