Fuel sender repair

Just ordered a sending unit, is there a way to fix this thing reading 1/4 tank problem before I put it in? I mean like will it hold if I go through all the trouble of soldering everything the way it is specified in the how to post?

I used a meter match on mine with an after market sender. Works pretty well. Cost about $40 or so. There are some threads on here I think. I can walk you through it as well if needed. The only complication is that you need to replace your IVR as well for it to work properly.