With 33s,3.08s, and a od of .7 you'd be turning 1427 at 65mph....you definatly wont like it..
I agree with the 4.10s....I have 4.10s with 31in tires..its a great combo...
My current truck is getting 4.56s with 33in tires...
Here's a rpm calc that might help...I use the column at the bottom...
http://www.csgnetwork.com/multirpmcalc.html
A locker is a must in my opinion
Ag 65mph heres what you'll get
3.08=-1427rpm
3,73=-1728rpm
4.10=-1899rpm
4.56=-2113rpm
If you've never done gear swaps youd be better off finding axles with what you want...gear setup can be hairpulling