Squeeling V belt and CVF alternator

The squealing belt issue is about how you tension the belt. I went thru this on my Duster, same setup but a stock alternator on a 340. I ended up making a bracket that bolts to the alternator to accept a breaker bar into it to actually tension the belt. I got it tighter than by pulling the alternator by hand, no squealing belt since. At the time I couldn’t find breaker bar and used a torque wrench to about 50 foot pounds and the alternator moved another 1/2” to 3/4” in the adjustment slot from where it was when I was just pulling the alternator by hand to tension. I also have cycled thru both Dayco and Gates belts as you did, but I retained the Gates as the Dayco is foreign made and stretched.