i am going to run a 275/60/15 tire. i will have to check on the 5th gear ratio. i wont be drag racing the car by any means. i think that i should probably put the dana 60 in there...because it would only be appropriate for "badness". just wondering if i should change the gear ratio in the dana. how hard is that and what all dana 60 gears will interchange. most of my experience is with 8 3/4.