Gas gauge not working. 1966 Barracuda

1966 Barracuda, I loaded the car up on my trailer to bring it home. The fuel gauge worked when I loaded it up. I unload at my home the needle pegs to the full then fell right out past E. The temp sensor guage is working as normal. I picked up a new fuel sending unit as im going to put a new tank in this winter. I plugged the new sending unit in and grounded the fuel tube to the body. I still have no movement on the needle.

Could this be a circuit board issue?
Could this be the wire that goes from the sending unit to the dash?
Is there a glass fuse that power goes through first?

Looking for next steps.
Thank you