I searched for old discussions on the advantages and disadvantages of switching from 6 volt to 12 volt. There are quite a few opinions but it seems to come down to better lighting, the advantages of modern sounds, and maybe easier starting. Living in a cooler climate the extra voltage may help starting on cold days.
I still have one big question. What do I have to do to switch the orginal 6 volt radio to 12 volt? I'm trying to keep the orginal look and feel of the truck without changing too much. Can the orginal radio live through a change?