[sick472]

If you do a good job of building and breaking in your drivetrain, then all you have to do is put a big tool box loaded with tools in the truck and you won't need them.

Seriously though, extra fluids and simple parts are great to have on hand as freshly built vehicles tend to show the weak spots pretty soon after hitting the road. Mostly bolts that loosen up, leaks, hose clamps that need tightening, funky wire connections (read - extra fuses in the glove box), etc.

+1 on the cooling system being top notch and drive it a lot before committing to the daily commute.