well, those years the VSN/vin is way different, and they all would have been originally registered using the engine number as the 'vin' on the title - see the tech tips about numbering in the early years
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics