Your fuel sender is a little different from the one in my 1996. But I've done that replacement, and I have a few thoughts on what you might find underneath. It'll vary from truck to truck.
- The fuel supply and return lines may have gotten smashed between the tank and the frame over time, or possibly on the assembly line. This can even flatten part of the steel line. Be prepared to fabricate some replacements. I had a coil of 3/8 inch and 5/16 inch OD silver-colored steel brake line ready to go, just in case. And I needed it. You can make a sort of bulge at the end to help retain the hose over the steel tube easily. With a good double flaring tool, use the correct sized mandrel to just start to bell the end of the tube. Just a little is all you need. (I learned this trick from a mechanic at a Shell station in Arnold, California when I was 17. He saved me $$$ over decades.)
- To drop the fuel tank, I used the least expensive Harbor Freight transmission jack with a piece of plywood bolted on it to make it longer. Worked like a champ. I think it goes without saying that driving until there's as little fuel as possible in the tank makes the job easier. Even so, I got diesel all over the place.
- The electrical connections on your truck's tank may--or may not--be visible and accessible. Mine were not. Worse, the plug and socket had hardened with age. I ended up cutting the wires upstream of the socket, and then soldering in about 18 inches more wire, with double wall shrink tube, to make it easier to reassemble. I used some CRC brand silicone spray to clean up the connector so it would actually disconnect like it was supposed to. When I reassembled it when all was done, I used dielectric grease in the connectors and in the snap so I could get it apart again, if I ever needed to. The extra 18 inches of length meant that I didn't have to reconnect the plug until the tank was fully installed.
- The plastic connectors that adapt the fuel hose to the top of the sender may have cracked or broken from age. It's a good idea to have replacements on hand. They aren't really necessary if you have good, flexible fuel hose that's designed for diesel and are willing to use hose clamps. The hose will be a tight fit and will look really odd. The connectors on my tank were still OK, surprisingly.
- When you buy the sender, also buy a replacement threaded ring and gasket. I didn't. I think I may be doing this job all over again when I'm 71.