(Note: 1965 International Harvester CO-4000 is different).
Blueprint - Click to view
Specifications (Even though I found a specification sheet there are many specs not mentioned so here is all I was able to find on the sheet).
Powertrain
Engine: Cummins NHE-195 6-Cylinder Diesel
Power output: 195 hp (145 kW) @ 1,950 rpm
Torque output: 580 lb-ft (786 Nm)@ 1,300 rpm
Transmission: International T-104 5H-74 5-Speed Constant Mesh
Traction: 6x6
Dimensions
Gross vehicle weight rating: 35,000 lbs (15,876 kg)
Other information
Origin: 
United States
In-Game Stats (85 mph was used for racing class).
Pricing: 7.3-14.2b
Exclusivity: None
Mastery: 0
Racing class: 38 
Maximum speed: 85 mph (137 km/h)
Acceleration: 7.1
Handling: 9.4
Braking: 7.5
Weight: 17.5 tonnes
Value: 160m
Maximum scraps: 5,000
Derby tier: 2
Attack score: 109
Defense score: 161
Earnings per part: 2m
Fictional name: Inatter-Harmm C-40-Y