you may be able to sneak it out if the truck has a body lift at all. otherwise
unplug fuel lines and electrical
droptank-straps will probably break usually only like 30$ or so
blow off top of tank so no shit falls in tank-not sure if sender is bolt in or has a ring
remove sender, replace and reassemble.
first id try unpluggin the electrical it may be a wiring concern. on fords open is full tank and 0ohms is empty. unplug and turn on key look at guage,turn off key put jumper wire in connector turn on key see if guage moves.
id say level 7 on dirtyness and labor and level 3 on complexity