Originally posted by ericnuyt Hanno, I dropped MH company a line to see what they've got to say...keep you posted.
Like Robert said, it is not likely M-H is able to help you with information - they even "can't service trucks sold prior to 1984"(!) See Marmon-Herrington Service and Parts > Historical Truck Parts for the contact details of Chuck's Trucks and Don Chew, two very knowledgeable M-H afficionados.