Invariably, (While doing any job that requires fuel tank removal), The customer manages to "Do us a favor" and fills the tank all the way up. This leads to dragging out the fuel recovery unit and waiting for it to pump the tank down to a manageable level. (Time added). Then doing the job, only to find out the parts dept. has ordered the wrong part. (More time added). Then realizing some S.O.B. who has the day off, managed to break the recovery unit so it won't switch to re-fill. Then, after fixing the damn thing, putting the correct part in and re-installing the tank, finally finishing the job.
Yes, on paper and by the book it looks soooo easy to do this but, in the real world, (At least mine), there are complications that lead to holes cut in the floor. I think someone had posted about lifting the bed on a truck. Yes, that is how I regularly do that job. Anything to keep from removing a tank somehow seems to be a benefit. IMHO
Never emptied a tank. Used a transmission jack to lower the full tank. Kept spare hose plugs for the full ones to prevent fuel spill. Cake walk. Took a full 42 gallon tank down out of a dodge van one time to swap the pump, no problem. Lowered it about 2 feet, popped the new fuel pump in, back up, done. There are a few exceptions such as some Camaros but you dont run into that very much.
Never did get removing the bed on a truck to change the pump. 6 bolts+, which are often seized up, not to mention lifting the huge bed off, then lining it back up to reinstall, (and risking dents/damage/scratches) when you can strap a transmission jack under the tank, or a good floor jack, secure it, disconnect the filler pipe, and have it down in a few minutes.
To each their own method, everyone has one.
i just love the simplicity of the "cut hole in floor" maneouver...simply beautiful....hehehe
For lack of a better description, cutting a hole in the floor is a hack job, IMO. Plus, how are you going to properly seal and paint the hole from the underside and prevent it from rusting out or leaking water in the future? Like I said before, to each their own.