The smaller water neck and thermostat on the later 318's is the same size as the Slant Six. Try looking up a hose for a Ram pick-up truck V8 from the 80's. I got a upper hose for a Dodge Ram 1988 D250. It was longer on the radiator end I cut about 5-6'' off. Water neck too. Hope you have Rams from that vintage it your neck of the woods !
Thanks for that lead, I'll do some searches for that truck. Good if it's a bit long, better than being too short. No we didn't get those Rams but I can get most parts imported from the US.
