Cuts out going up hill.

I will look at that hose it is not that old but I know its not efi rated just normal fuel line
That's not the only piece. Make sure to check them all. The piece that failed on me was probably no more than 5 years old. The EFI stuff is all I'll use now. I guess because of the truck's length, it had a piece of rubber hose about in the middle of the truck. It still had factory Ford part numbers on it. The truck is a 1975 model. lol It's funny though, although that piece was dry rotted, it was not all soft and mushy like the piece on the sending unit.