I think my belt problems have run their course finally. It took a new alternator pulley, two more belts which still had problems staying on the pulleys, and finally a retorque of the nut holding the pulleys on the tensioner to get this problem fixed. The nut had backed off and the entire pulley/tensioner was wobbling a bit. On the plus side I finally broke down and bought a pulley holder and fan wrench after years of messing around with a huge adjustable wrench and swearing a lot.
A few pics of the pulley and resulting belt damage, and the car in OK with my pups.
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