6 volt versus 12 volt starters on 218 engines

[Dennis46PU]

My receptacle is for a phone or periferal changer only, no smoking allowed in my truck.  I don't know of anybody that makes a charger to plug in a receptacle that is positive ground.  Many reasons I changed to 12 volt negative ground.  None of my gauges worked.  I lost patience trying to find good working original gauges and swapped all of them out.  Modern gauges, phone charger, lights, turn signals, starter, ignition (pertronix even though they make all in 6 or 12 volt positive and negative ground for each voltage), all work better now.  When I got this truck I really wanted to keep it 6 volt positive ground, correct wire size and color all cloth wrapped, but there were just too many down sides to keep my interest in 6 volt positive ground.  

[55 Fargo]

Yes forgot about pos grnd, tried a GPS a few years back in my 47 Chrysler, fired the fuse in the gps unit.

This could be an issue with a USB type socket charger, unless the polarity is reversed and really, and with an 8 volt battery set-up, do not see why not, as he does not have a Mopar 6 volt tube radio, which is the most sensitive of all....