SWEET if right, best thing you can do for the vehicle. Besides cruising speed you'll love the pick up in ALL the gears. I've gone to higher ratio in all my trucks and it's always been a good move. If I were in steep mountains I'd opt for an overdrive trans though, love the T-5 in my pickup.

It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed