Today I aquired an 85BJ70 and the one thing that is nagging me is that it has dual batteries...85's were 12 volt systems...could these two full size batteis be twin 6 volts? Did they ever come from the factory with dual batteries as an option on 12 volt systems? I doubt she added this as I purchased it from the original owner ( an old granny)...Sorry if it's a stupid question, but I'm learnin the diesel thing as I go 
