Tank Clearances for standard body mounts in good condition (these are Energy polyurethane). Collapsed mounts will provide less clearance; a body lift will provide more.
If using a reciprocating saw (sawzall, jigsaw, etc.), consider the blade's MAXIMUM depth from the shoe. If using a cutting wheel, consider where the hot sparks are going. But an air hammer with slitting chisel would have been safer, quieter, & quicker. And it would have produced no shavings, and couldn't have damaged the hose or fuel lines, even if it touched them.

Before attempting to disconnect this style of fuel lines ('92-96), read this caption:

Older fuel lines are much easier to remove, cut, and MELT.
Once they're off, and the plate is clean, use a non-sparking (brass) drift & hammer to turn the lock ring CCW. If it's stuck, the only acceptable lubricant is CLEAN MOTOR OIL. No penetrating oil; no silicone lube; no grease; no WD40.
For more about repairing the FDM or replacing the pump, read all the captions in this album:

For info about reparing the level sender, read these: