Float needle was the problem. Running beautifully again.
Took it out for a ride. Had to bump start it after a stop. Starter destroyed the brushes three weeks after I rebuilt it. Sheesh.
New to me used one on the way from TN thanks to a GSResources forum member. About the same cost as the parts to rebuild the original would have cost.
Eventually, I WILL be able to ride more than an hour before taking on another repair.