Even if I had a hole cut in the floor, I don't think I could get my pumps out without dropping the tank. The three 6AN lines and 90 degree fittings on the pump hat make for a tight fit, that required a lot of sheet metal clearance work with a hammer.
Do you have a dual intank pump?
That would be my only guess for the 3 6AN lines..... 2 supply, 1 return?
I didn't have crazy amounts of room with my setup, I can only imagine 3 lines lol