As part of the 6v to 12v conversion I’m doing for my 1955.1 Chevy 3100 I’ll be replacing the original 6v gauges with new 12c compatible gauges. I’m interested to hear the group’s recommendations on the best gauges presently out there. I do desire to mount the new gauges in their original position in the dash. I’m not absolutely set on buying new gauges that have the same appearance as the original. As always, products made/serviced in the USA are a plus if available. Thanks in advance for the feedback.
Is there anything wrong with your current gauges? If not, then as Bartamos says they should work fine.
You could get a voltage reducer for the fuel gauge, or member Jon G has done a lot of testing on the fuel gauges and per his results, you can use a 6V gauge on 12V but after a while it will no longer function on 6V anymore. As long as you don't intend to ever go back it should also be fine.
You will want to replace all the bulbs in your gauges with appropriate 12V ones.