Fuel tank sending units for dealer aux. tanks on truck

[Jerblazer72]

Guys,
I just bought a set of "dealer option" auxilliary tanks for my 72 gmc. They did not have a fuel gauge on them, just the sending unit. The PO of my truck removed the tanks from the truck I now own. It was set up with a switch to change the fuel gauge from each tank so that you know what you have in each. I would like to put sending units with fuel gauges back into the tanks that I just purchsed. Do any of the venders here on the site sell the sending units that I would need? If not, does anyone have a recommendation of where I can purchase two of them? Also, do they need to be 90 ohm? (from what I have read, I think they do)
Thanks for your help.

[Sammy]

Depending on if it would mount in your tank your stock floats should work which requires a 90 ohm for your in-dash gage.

[jbarron]

I just got through putting my aux tank back in service. Something you might consider is using a tank switcher from a 73 and up chevy. My in dash switch was not working and the truck had manual switchers for both lines mounted next to the seat. You can buy the switcher and connecter new.