[SWEET7T]

To start off, look at the rocker panels, kick panels, drip rail, and rear cab corners for rust. These spots seem like they are the first to start rotting.

Depending on how you want to build the truck, will help narrow down what you exactly want (If you plan on changing a bunch of stuff out, then you don't have to worry about it being on the truck, or being rusted, ect)