Seems like the stuttering/hesitation issue is resolved with Nellie: spark plugs.
Put in a different sediment fuel bowl and had great flow to the carb. After she wouldn't start and wouldn't start, did a continuity test on the plug wires. I had the #2 and #3 wires criss-crossed. Rearranged that and she started right up and sounded like she did before. Hesitating, lack of power on throttle up.
Put in some AutoLite 386's gapped to .023 and she fired up and sounded normal. Drove around the yard and house a couple times w/o any hesitation or issue.
Makes for a happy moment with my tractor again.