I believe the 55 1st was electric, but it was by 55 2nd for sure - doesn't metter tho, if you've got an electric gauge, just switch to an electric sender - no on the fuse, will do nothing

Bill

Moved over to the Passing Lane

"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