There are five engine configurations available.
base (500 horsepower)
mild (900 horsepower)
Hot without CVT (1200hp)
FDR (2500 horsepower)
There are four headache racks available.
Toolbox for Headache Loggers
Cab Protector 7-wheel configurations
LISTENING
All of the FDR options in the car shop must be chosen in order for the "FDR setup" to function properly. After installing the Power Tools mod, you may fill the truck with "water" to serve as a counterweight (see the photos).

Jbloch is credited.