Slant six alt.

Looked up the alternator for your car at AZ. As typical, they show only 100 amp and a 65 amp so if there is a lower amperage one the case is the same as the 65 and them build all of them to 65 amp rating.

Anyway, perhaps could narrow your choices down a bit by looking at least at these two pictures they show of them.

As a note, used to be a thing that the alternators from some makers had the amps stamped on it.

Hope this helps a bit at least!

Cheers

Hope this works as well. Hope the first pic is the 100amp unit. Has a bracket piece made on with two mounting holes next to each other.

The second pic (I hope) is of the 65 amp that has just the pivot hole at the bottom and then the other bolt screws into the casing.

100amp.jpg

65amp.jpg