What Im saying is decide on the size tire you are gonna run then pick a gear that puts the rpms you are comfortable with at lets say 60 or 65 MPH so it can go on the highway with out killing you while driving
gear don't mean anything to the rpm. The height of the tire is the deciding factor.
If you are gonna run 4.56s and 31 inch tall tire then go ahead but if not don't run that gear
I'm thinking what sounds like the best setup might be to go with a regular 833 and think about dropping the ration down to a 3.55 or 3.23 in the back...
If you are doin this are you goin to sell the 3.91's?