Next time just tip the bed and install the pump from the top. It is a lot less hassle to do compared to dropping the tank.
I can’t imagine doing it any other way…
unless the bed is loaded with “stuff” that complicates removal, like big fuel tanks, sprayer equipment, salt/fertilizer spreader, etc.
There’s a ground wire from the taillights to the frame that may need to be removed. It’s easy to forget.
On my 1995 SCLB S10 it was a breeze.
On my Suburban though… I assume a tank drop would be easier.