It's supposed to take place in the mid 2010s and be a really underfunded town with a sub 800 people population.
After the mod is released, I'll probably start adding more modern vehicles like the new 2018+ Beaverhead sheriff units, and of course, all new Montana Highway Patrol stuff.
To this day, the real VFD's in that area of Montana still run old rigs like an old Mack or 1990's Freightliner. Another department in the county (but not depicted in the mod) still keeps a 90's Kenworth tanker too.