Poor idle and running rich can be attributed to the carburetor. Skipping is a different thing. A compression test would be a good start, check plugs and wires, dwell, and timing.
Even though you put a rebuild kit into the carburetor, did you make all of the adjustments? Needle and seat, float level, metering rod adjustment, and mixture screws????? Also, check to see that your float actually floats in gasoline. A favorite on old carbs is a saturated or leaky float. Even with everything adjusted to spec, your carb would be continually flooding the engine from too much fuel in the bowl.
You can investigate some more, do some diagnostics, or just take the expen$ive way out.....
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Today's Featured Article - Identifying Tractor Smells - by Curtis Von Fange. We are continuing our series on learning to talk the language of our tractor. Since we can’t actually talk to our tractors, though some of the older sect of farmers might disagree, we use our five physical senses to observe and construe what our iron age friends are trying to tell us. We have already talked about some of the colors the unit might leave as clues to its well-being. Now we are going to use our noses to diagnose particular smells. ELECTRICAL SMELLS
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