fuel sending unit question

[Chrispbrown36]

My truck has dual tanks on it but the passenger side tank is not working. The previous owner said he knows the sending unit needs to be replaced. I was thinking I might go ahead and pull it out now and change the unit when I have a chance. I have never dealt with dual tanks or even a sending unit in general, so I am wondering if dropping the tank will cause any problems with the working tank? Any tips on dropping the tank or what else I might need to replace while at it?