1991 blazer cutting a fuel pump door to access fuel pump assembly?

[RaTcheTmasTer]

So I have a 1991 GMC Jimmy 5.7. fuel pump is bad. I want to replace the whole assembly.

It has 30 gallons of fuel in it.

I know I can empty the fuel, etc. but I have heard of some people cutting an access panel in the floor (under my carpet) that I can do and avoid dropping the tank.
Yes, some will say I am stupid to to that, but I would like to use the metal I cut and put it back in place with the ability to remove it again. So many people out there say that the have had to replace faulty pumps that were new 2-3 times.

I hope to eventually LSX the truck in the next 4-5 years as it has 170,000 miles on it.

Has anyone done this without "hacking" the truck apart? Maybe a method that is as clean as possible?
Thanks.