For some reason I can't locate the fuse box inside my '07 Supercrew with the bench seat. I even read the owner's manual and it was pretty vague. Where is it?

 

Passenger side kick panel...

 

Don't worry, that intrument panel term got me. Took me some time when I got my 2006.

Like Joe said, pass side kick panel. there is a finger bump ( vs a finger hole ) where the floor slopes into the firewall. Pull this in an arc towards the back of the truck ( away from the outside of the truck ). There are 2 tongues in the rear of the panel ( where it meets the A pillar ).

Once this is off, you will see the cover on the fuse panel.