Should have pulled it out the top
Did you use some PB blaster on the bolts, to help break up the corrosion? Did you use anti-sieze when re-assembling?
As for the lower bracket, the top bolt really holds the alternator in place as the lower is more of a pivot point. At least you could get it welded.
The V6 needs to drop out the bottom, but even then, it is pretty easy with a manual tranny. I have done it on an automatic and dropped it out the bottom, while others had to disconnect a tierod.
Be careful to not overtighten the belt, or you will be replacing the alternator again
From Chiltons: (again, I pulled the alternator out the top)
Disconnect the negative (-) battery cable.
Remove the air cleaner assembly and move out of the way.
Disconnect the upper strut mount.
Remove the alternator adjusting bolt, upper adjusting bracket and drive belt.
Disconnect the wiring from the back of the alternator.
Lower the alternator mounting bracket and remove the alternator from the bottom of the vehicle.
[This message has been edited by jaskispyder (edited 06-12-2015).]