Wrong Alternator???

[Myetball]

I did a search and didn't find the answer. Anyway, I've got a '92 with a fried alternator. The previous owner was kind enough to give my all his info so I could get it exchanged under warranty from Autozone. Took two days to come in and when I went to mount it up it was obvious there was no way it was gonna fit.

Looks close to the one I pulled off, the front looks different and the mounting tabs are slightly off. Could it be I ended up with an alternator for a later year? Is there a year range that the alternators match up/don't match up?

Wanting to know before I head back to Autozone to get another one.....and wait another two or three days.