6 volt to 12 volt conversion

[rol1949]

I would like to convert my 6 volt system in my 1949 F1 pickup to 12 volt. Do I have to buy the $419 kit to change over everything or can I replace just a few items since some say my starter will handle a 12 volt battery. I have a 6 volt heater and also 6 volt dash lights/insruments. I am sure I have to replace the bulbs in my headlights/tailights and old generator.

Please advise as to cost and where to buy all of these items

Thanks,
Rod