The 3.73 vs 3.91 Dilemma

Agree, little difference between the two. However, if you are not drag racing, from my experience I would go 3:73 especially with the 3:27 1st gear. Just curious why not stay with the 3:23? Also, you should be able to find a 3:91 third member (assuming you have an 8-3/4"). 3:73 is a non-factory gear set.