Checking out behind my seat I see two build sheets. The seat is already torn up, so I decided to see what these were all about.
It appears that neither are from this truck originally, but for all I know it could.
Click for the full size. I left them huge so everything can be easily read (well, as easily as can be for the condition)
This build sheet looks like it's from a local truck. I can make out "CE GARAGE" and "ROCK OREGON" which plugging in to google gives me an obituary from a guy in Pendleton who worked at a Maurice Garage. And Pilot Rock is just south of Pendleton a bit, so it makes sense.
The truck this belongs to seems to have headed up to Poulsbo Washington. The address is a bit more legible, Lucky's something Garage in Poulsbo
I love the history these sheets tell.