So I've been looking around the internet about going into a lower gear ratio to give me back some low end power, since i gotten larger tires. I know that current (stock) ratio is 3.42 and I have a G80 limited slip differential. I got GM 8.5" 10 bolt differential, and I have 35's on my truck currently and my stock tire size is 265/70x17. I was looking into 4.56 gear ratio or maybe a 4.10 (or 4.30) but really unsure of what to get really. Cause eventually after my 35's wear out im probably stepping down to 33's. Im looking to see what would give me a little bit better mpg increase and more power since those 3.42 pushing those big ol' tires and using more fuel to get those tires going. I off-road a little bit and drive highway maybe a couple times a week, but i do a lot of driving in town. I want to buy the pinion and gear my self, i know i got to buy 2 sets cause my truck is 4WD. But really dont know what to get or what would be a good brand without spending too much money, and have a mechanic install it for me. Any suggestion guys?