Will this work for starting with 12v

Was thinking and looking at the wiring diagram for my 1947 Dodge D-24 with 6v pos. ground. Noticed there is only one wire that comes off the solenoid, it goes to starter ****on then to ign. Then everything else comes off the ign. My thought is to use a 12v batt. switch to neg. ground. Take the Gen. wires off use batt. charger till I put a alternator on. Put one or two resistors on the wire coming off the starter ****on to the ign. to drop 12v to 6 or 8 volt. This should work to use the 12v to start car and still drop down to 6v to run rest of car. Take and switch the wires on the coil and done. I think this will work? What do you guys think? This will save me the time of changing all the bulbs, coil, and redoing gauges.
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why not just go with a 8 volt battery and bump the regulator up to charge there? save your self a bunch of work. just a thought.

 

Do all auto parts stores stock 8 volt batteries?Would be a ***** to break down in a little town and all they had was 6volt and 12 volt

 

Stupid---just convert it to 12 v now--a lot easier than repairing the melted harness or burnt car that will result--an electrical system is not the place to be cheap --also how do you intend to keep that battery charged? a long extension cord plugged into the charger you carry in the trunk

 

If it is like my 50 Plymouth, the voltage regulator will go off like a pinball machine with an 8V battery. It's not an overly complicated system, just move her over to 12V.