Pretty straight forward, you need to drop the fuel tank, and remove the sending unit that the pump is part of.
However.... This job has caused thousands of fires at homes and businesses when very simple mistakes are made, not the least of which concerns lighting that is necessary to see what you are doing. Many folks still use incandescent light bulb drop lights and with all of the fuel vapors and accident that causes the bub to break (drop it, splash it with fuel) exposes an ignition source.
I do not advise anyone to do this job without real training or supervision. A few bucks aren't worth the risks involved. JMHO