if you do have a fuse panel it should be on the foot board above the clutch pedal, looks like this, but one wasn't installed factory unless there was a number of electrical options, and I doubt clearance lights were factory in '57
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
