Solid-State Voltage Regulator Conversions

MY QUESTION IS as clean as that photo looks, why on earth would you want to convert such a beauty to 12V?

That picture is not mine. My jeep was 12v when I got it, I would have to change everything back to 6v. Sometimes these 6v jeeps have a terrible time turning over even more if it is cold outside. The 12v system just works so much better.