Fuel gauge repair

On our trip home from Eugene this month our aux gas tank gauge went all the way down past the big E.  So today I took a look into what was working, or not working.  I switched wires from the main and aux gauges and found out that the gauge was working but not the sender.  That means the aux tank needs to come down and the wires to the sender were good but still no work.

Now when I first got Wilbur 7 years ago, oh I mean 8 years ago I replaced both senders and gauges with ones that were Dodge ones.  That meant that the resistance for empty was 78 ohms and full was 10 ohms, or something like that.  Chevy and Ford used some different resistance.  And so I was looking for a sender that worked with the gauge I had and found out that no one sold the Dodge senders but I could get a Chevy gauge and sender right down the street at Knechts.  The sender was $27.99 and the gauge was $17.79.  that was the best price I could find in town and sense I wanted to finish up this job while it wasn't raining i bought them and put in the sender.  The gauge works even if the gauge is not the right one.  Changing the gauge is the easy part since I have the same brand in it now and the wires are all the same.