Watch the Kurt's Grunge online guitar lesson by Angus Clark from Hard Rock Survival Guide: Rhythm
I'm kind of thinking of this as the Kurt Cobain part vs. the Jerry Cantrell part from the last pass. Almost all of the chords are major with the major third fully audible, not power chords. Watch the way I strum on this cleaned up part. It's not as aggressive as how I was playing the other part on this track.