I'll look into both the 4.10s and 4.56s. There's other people telling me different so I'll do some more research before I make the final decision. I need to atleast be able to go 80-85 on interstate. I drive mostly between 55mph and 75mph.

 

It's your truck do as you see fit, all I can do is offer my advice. I am surprised no one posted 4.88 all the way.