Just did my alternator last week. Standard 27mm crows foot did the job, and a 27mm spanner crows foot showed up after I was done. You have slightly more room on the farthest passenger (right side) line. So, loosen it first and get the 'nut' out of the way for the other. Putting it together do the left side first then the right.
They say you don't have to do service position to get in there, but I did anyway (including the intake plenum). I was glad I did because it took about 50 hard whacks with a BFH and a 3 foot rod to get the freakin' alternator out of there. Hit it 10 times, climb under, rotate with a pry bar, hit it 10 times... I actually broke part of the casing beating on the stupid thing. I measured the distance between the ears (or the little nutsert) and the old one was a full .030" less than the new one. New one fit snug, but not tight like it should.
Additionally, it's always bothered me I didn't do some kind of wrap while doing the timing belt. Casting tape for fun:) Yes, I know it's goofy.
Attachment 17563