I would unhook your gas gauge, you might fry it with the 12 volts. And don't run heater either. Since you are converting it won't matter if you ruin the bulbs, but try to save those for us that have retained our 6 volt systems.
Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix