just do it. i'll tell ya that 4.88s aren't enough.
and did you miss the STICKY at the top of the page about gearing questions?!
CRASH said:
35's: 4.88's (Only because you can't get 5.13's in a Dana 30. If you live in a state that has a SINGLE rock you may one day want to climb, ditch the 30 and step up to a 44 and 5.13's)
ill say that i dont recommend it for a daily/fast highway use, but 35's and 5.89's w/ a 5 speed was amazing offroad, and 60mph in 5th was about 3000 rpm, maybe a little more
5.13 and 36's, aw4. I have a 20 mile highway comute to work. I do not know my speed but going with the flow. I am around 2200-2500 rmp's. It is not an issue. Do It.