Hose Size is 8mm (5/16")...
Hose Size is 8mm (5/16") in the pipe from the tank.
BTW... if you trace the feed line from the tank to the engine area, it might pass through a petrol filter usually mounted on the frame or very bottom of the bulkhead.
This thing is often full of trash and the petrol filter is not too compatible with diesel, so make sure you get rid of it.
You should also install a sedimenter between the tank and the lift pump, then the fuel filter and IP. There is a recent thread on sedimenters.
Hope this helps...
The fuel filler on the 1983 is often preferred over the later ones.
What's your issue with it?
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)