Gear Ratio

I was wondering if anyone could help me out. My truck has a 6" pro comp suspension lift with a 3" inch body lift. Since losing the original take off speed and fuel economy (running 35's) I've been looking to get it back. I’m going to re-gear my truck but before doing so I was wondering if anyone could give me some advice.

 

look no further

http://www.urdusa.com/product_info.php?products_id=126019804

 

It would be perfect but I need something less expensive.

 

deckplate mod, intake, exhaust, TB spacer, all of these will give you a little somthing but to get any real power SC or turbo is the only way to go. also you lose 5% of your MPG with every 3 or 6 (not exactly sure) inches of lift.. gears should give you most everything back except that 5%