Specifications include, but are not limited to: a) 66,000 Gross Vehicle Weight (GVW), with day cab, approximant length from back of cab to center of trunnion is 174-190 CT (Final length when the hook has been selected, please price the longer CT) b) Engine with Jacobsen engine brake and block heater rated at 425hp or equivalent c) Heavy duty air filtration for engine d) Large cooling module with low clog radiator with a max of 8 to 10 fins per inch and long-life coolant silicone hoses and constant torque clamps e) Allison RDS 4500 or better Automatic transmission heavy duty or equivalent with floor mounted shift controls f) Jump start terminals with battery main disconnect g) Heavy duty 20,000 lb. front axle with 315-80-22.5 tires on steel wheels with short offset