Original 1978 Dodge Truck Dealer Service Manual Supplement. This Shop Manual Supplement is what the Dealer used to service and repair your 100-400 Series Truck. It has the updated information and procedures for the 1978 Dodge Truck Models and was meant to be used along with the 1977 Truck Shop Manual 81-370-7013 [Not Included] for Full Coverage. It is in good condition with minor wear and soiling [see photos]. This Supplement when used along with the 1977 Service Manual is an informative and valuable tool for the Dodge D&W 100-400 Truck. 81-370-8112