Thats custom Kenworth W900L truck, it is independent model and does not change any other truck.
It have different cabin versions long and short.
Truck can be bought at large Iveco room.
Mod have bug while watching out over window from drivers seat (shown in video).
If you purchase a truck (heavy haul) chassis, DO NOT attempt to modify the chassis on that vehicle again.
Doing so will cause a crash (screen freeze).
If you want to change chassis you have to buy new truck.
The 8×6 chassis otherwise works correctly.
Also please read Readme.txt file
Game version: 1.4.x
Aiightis has created the mod
Mike38239 has adapted the mod to patch 1.4.x
XBase66 has gepaintet the truck and the interior
Onixer – interior, dash and animations
Carlosbruxel – For accessory parts
Mitch Blake – For daycab “cab” model
Kris – for the original KW900 model from haulin.