1972 dart alternator pulley shaft question

Larger diameter pulley will not charge as well at idle. Otherwise it will be ok.

How are you putting the belt on?

You should be able to loosen the tensioning bolt and rotate the alt inches out of the way then pull it back up to tighten the belt.

yes like that . but it starts out rather snug because of the larger pulley . the tensioning bolt at its loosest point all the way , is already kinda snug until you get the belt around the pulley and into the groove , then i lift up and tighten the tension bolt , then tighten the top bolt .

test driving it , its going ALL the way to the charge side anything past idle , and mostly staying there . maybe the battery was really drained , but after 10 minutes of driving it has not moved . i am gonna test with the multimeter , i don't want to cook the battery . it came down to normal driving with the lights and a/c and heater blower on . went right back to all the way if you turn them off . not sure if i am overthinking it .