oh well that is awesome thank you very much. but two problems...what is oriellys? and is the max energy you mentioned the same hypertech one that i was talking about?

 

oreily
http://www.oreillyauto.com/EW3/HomePage.do

hypertech max energy
http://www.hypertech-inc.com/Products/Max%20Energy

 

You could consider taller gears.

 

u gotta put urtruck back to stock if u want better gas mileage but after all that work into it to lift it just buy a beater car, my truck is lowered and im only averiging 11in city and about 16 on the freeway about 20 downhill lol! i hope you dont have the aluminum driveshaft, mine just snapped yesterday! gonna have one made this coming week!

 

Do not put 5" exhaust on it.. you'll only hurt it. You need more back pressure. I have a modded diesel and I don't have a need for 5".. it wold only hurt my motor too.