The 917 is a 12 yard box and all side boards will do is put way over on axle weight.
[M-917 20-Ton Dump TruckThe full nomenclature of the M917 is Truck Chassis, 75,000 GVWR, 8x6, for 20-ton dump truck, 12 cu yd dump truck. It is also called Truck, Dump, 20-Ton, 8x6.The M917 vehicles are...