From what i was looking at on mine, to fit the mk2 alternator you still need the bracket that bolts on to the block, where the power steering bracket bolts on.
Now i may have this completely wrong, as i was just cross referencing it with other pics i had seen. Also, i don't have power steering so not 100% on the bracket set-up there!
Do you have any pics of yours in it's current state? Might help a bit!