Clog was the brake cylinders. Replaced those. Also rerouted the brakeline to the rear. Someone replaced it at some point and ran it outside the rail. Dirt packed in between the frame rail and the tank corroded the original. Cleaned all of that out as well as the gas tank.

Fixed the fuel sending unit wire and the gauge still isn't working. I'll have to track that down. Could be the gauge. Sending unit was working.