Compare this:
To this:
And you can easily see that this must go:
I have images of the actual view showing what needed to be removed from where on the block, but I haven't uploaded them yet. On the 2003 block, you will have to remove an "ear" off the head and one off the block on the "other" side from where these pictures where taken ... it must be done to allow the alternator bracket to fit. A hacksaw + die grinder/angle grinder/sander + 20 minutes = all done
BTW, nothing is done to the bellhousing