I'm looking at a 99 chev 3/4 ton, it has 4.10 gears in it now. I don't need that low of a ratio. I was wondering the best place to get ring and pinion gears to change them out to 3.73 . Would it be cheaper to get a lift kit/bigger tires?

I don't know if any of the supporting vendors sell such items, but I have always had great service from Randy's Ring & Pinion. (ringpinion.com)