I happen to know exactly where this body came from too. You can see the "SRF" sticker residue on the back of the body. This stands for Six Rivers Forest. As I was strapping this down I happened to see Salyer on the side if I looked at it just right. That is Salyer CA which is about 20 miles east of where I grew up on highway 299. I asked the guy I bought it from if he knew the history on it. He got it at an auction in Eureka CA for the truck chassis, he said it was about a 2001 truck. I worked at a shop in Eureka from 2003-2009 where I worked on a fair bit of Six Rivers equipment, crew buggies, engines, and light duty vehicles so there is a chance I actually worked on this very unit when it was in Forest Service service. I also know the Salyer area well as I spent a few hot summers there in the late 80s setting chokers behind a Cat D8 for my dad's logging business, I was cheap labor for him while in high school.
Before I unload it to start converting it I'm going to:
1) Pull the pass through boot and get a glass shop to put glass in. I'm not sure if I'll put the pass through back but the glass will keep the elements and critters out while I convert it.
2) Take it to the locksmith and get keys made for all the locks.
3) Take it across the Cat scales and then unload it so I have an idea what it weighs when I start.
I'll document my conversion here as I can't find much online for doing this, most of what I do find is on this website. It won't be quick but hopefully in a couple years it will be on a chassis out camping.