You should replace alla the parts on that truck that are over 6 years old.
Damn...
I don't know if I'd agree to that, but if you have the bed off, I'd certainly look at replacing brake lines that show rust. Whether its a $700 or $7000 truck you don't want brake issues while driving.
I ended up buying a new extra sending unit because it took so long to get one shipped from Malaysia, so I have the one from Malaysia, if anyone reading this needs one, I'd give it to someone if they just cover a few dollars for shipping. Its just going to sit in my garage collecting dust