Originally Posted By: Trav
You need to drop the tank but if you can lower the tank just enough to see where the pump unit is located you can probably cut an access panel with tin snips.
Cover it with a piece of sheet metal using silicone as a sealer and securing it with short sheet metal screws.
+1. Did this on an 88 Plymouth minivan years ago. The idea of dropping the tank looked to be a major league PITA so I pulled the seats out, pulled carpet back and after carefully measuring, cut a panel in the floor with an angle grinder. Made the job a ton easier.