1. You have a 12V battery, yes?
2. Are you in the process of converting to 12V?
3. Are you adding a new harness?
4. Your 292 is a 12V motor, yes? Came with 12V starter, generator, voltage regulator, coil, yes?
5. Foot start? or electric solenoid?
6. Do you have a ballast resistor?
7. Are you doing turn signals?
8. What year is your 292?
I think you need to wait and be careful until you explain what is going on. All we know is you are asking about bulbs. Ammeter and fuel Sender are not voltage dependent.
You say: I *thought* 12v bulbs work with 12v system.. or am I missing something in regards to the gauge housing?
You also ask if you should use 6V or 12V bulbs. If you are indeed converting to 12V, there are a whole lot of things to know. If you use gauges, electric heater fan motor, bulbs, coil, generator, voltage regulator..... that are from a 6V system, in a 12V conversion, you will burn things out!!!!!!!!!!!!
We can advise every step of the way to a conversion. One step at a time.
You are in "interiors" this should be in electrical.
