Its really gonna be all opinion. If you arnt gonna stick any type of forced induction on it and dont mind cruising on the freeway at 3k+ and do a lot of racing from a dig then >3.73. If no to any of those I would say 3.73 are perfect. I have 3.90 and most of the racing I do is on the freeway and I dont like keeping up with traffic being at 3200rpms constantly in 5th gear. Im switching to 3.73s they just seem perfect from the ones I have driven and ridden in.
