Switching over to a racing fuel cell and need to know the resistance range of the existing gauge so I can order a sending unit that is compatible with the gauge. Most seem to be 0-90 ohms.

Searched for "+fuel +gauge +resistance"

Found this thread in about 1 minute.

Thanks McMark. Wasn't trying to be lazy, just efficient as I'm at work. Should have searched myself. And thank you for the thread. Looks like 0-90 ohm range will work fine with the existing gauge, just might not have a working low level light.

It will work but read upside down...

You will need one of these to make it read correctly...

https://www.spiyda.com/magento/index.php/fu...uge-wizard.html

These guys will even set it up for you. The GM sender you speak of is 0-90 ohms the VDO gauge needs 70-7 ohms