I run 33s on mine with stock gears. it needs just a bit more feathering to get rolling off the line, and because of the extra diameter of the tire I roll at 4000rpm at 70mph in 4th, where a stock vehicle will cruise at 4000rpm in 5th at 70mph.
Because you dont have any mnore horsepower availible, you wont actually go any faster on the highway just by changing gears, you will just get your 5th gear back.
if you install 5.89:1 gears in your diffs, you will be able to take off faster from a dead stop, and on the highway you'll cruise in 5th, much like when your vehicle was stock, except of course powerlosses from having all the extra weight on your wheels.