Hello guys, I extended the length of my battery box to hold two in series deep cycle batteries. They fit through the original battery cavity under the battery lid in the floor just fine. I then put an automatic switch under the dash that goes to all six volt systems. this way I can run a 12 volt a/c, on the firewall I have two lugs, one is 6 volt the other is 12. I can charge it on twelve or six volt. The 6 volt generator works well and the starter (6 volt), turns like it has a twelve volt battery. Four years and still going strong. If anyone wants a hand drawn schematic and pictures give me a day or so. Ed