Back from a long weekend trip to Eugene, OR. Currently, the belt is on half the flywheel grooves, and half on the rim of the alternator pulley. Looks weird, but seems stable. My first thought is to use bondo on the flywheel, and make the grooves vanish, and see where the belt wants to track. Sort of what I was doing with the wide tape, and trying to crown the flywheel, and move the alternator pulley to where the belt is happy. I don't think the engine is shifting on it's mounts, I bought some square taper washers to put on the backside of the I beam, so I could get good torque on the bolts, and more friction on the I beam. And I see no evidence of the engine having moved at all.
I don't know if I can flip the alternator around to use the other flywheel, the mount is welded on, and the alternator bolts are trapped under the welded frame area. And that would put a belt right next to where I have to adjust the fuel rack, and reach over to the de-compressor. A bare flywheel might not snag me, but the fabric/rubber belt may catch me. That is the last option. New topic for new issue (slobber).