The model number/ size thing is not specific to keystone /Montana. Take your tape measure. The actual length of the 3400 is 39 feet 1 inch. The model that folks have suit their specific needs.Find the model that suits your needs
Rich& Helen N.Ridgeville,Ohio.
F-350SD, Lariat, V-10,4:30 Diff, tow command Long bed, Crew Cab Dually, 06 3400RL
Mor-Ryde Pin Box
