Things might go smooth!
I do not know if you still have the old sender, it can be checked with an ohm meter.
I always do this with a sender before I install it. Sometimes I can tweak it to be more accurate, or at minimum tweak it to where it shows "empty" (perfectly over the line) and still have a gallon or two below the line. (This might bide me a little time), I still do not worry about running out, I have jerry can on the back of both the 1977 and the 1946 that I always keep full!
Sometimes it is impossible to tweak "Full" and "Empty" to read exact by bending the float arm, however, you can get one or the other close. I do my checks before I install.
Below, I have a sender capable of six inches to twenty four inches, In my case the six inch area was the desire. So I did not need the extension bar (not shown) which enabled a twenty four inch tank depth. I have already done the "geometry" and cut the float arm to the proper length according to the chart that came with the sender.
See my pictures below, these are of the 1946, kind of a short tank under the driver's seat. All that is needed is to alligator on a ground and insure the sender wire is on it. Note the gauge on the dash behind my float settings.
Images (Click to enlarge)
Saturday, July 23rd, 2016 AT 7:32 PM