[LILRED66]

Originally Posted by gmcpkup

I am using the stock gauge so maybe they are not compatible thanks for the imput. If any one knows where I can get different parts for the sending unit I would appreciate the info.

Try these sites for parts for your truck, including fuel sending units:

www.bowtiebits.com
www.lmctruck.com
www.classicparts.com
www.ecklerstrucks.com
www.gspp.com
www.truckandcarshop.com
www.harmons.com
www.oldmusclecars.com
www.classicchevroletparts.com
www.classicindustries.com
www.bobschevytrucks.com
www.brotherstrucks.com
www.mar-k.com
www.wheelvintiques.com
www.totallystainless.com
www.earlyclassic.com
www.horkeyswoodandparts.com
www.raybuck.com
www.americanclassic.com
www.yogisinc.com
www.rbsauto.com
www.obschevy.com
www.cheyennepickup.com
www.chevypickupparts.com

Not all of these sites will have fuel sending units, but they are good sources for other items, as well.