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Needs smaller cam - Needs more ignition advance at idle to try to make up for huge cam. Careful carb setup would help. It is not about carb SIZE as much as it is the throttle stop setting/main jetting/float setting/acellerator pump setting/manifold vacuum at idle hooked up to the advance can (and fully deployed) that will help.
Gap the plugs at .035". Big gaps are needed for lean, emissions-type mixtures. You do not need that big of a gap. Not going to fix anything but might help.
-Mark.
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