Still finding my way round service box, but,
I am looking for the short (3-4") straightish water hose that runs back from behind the stat assembly, sits above the bell housing at the end of the engine block.
Service box shows part 1307 J3 but it's not clear on the exploded view exactly where it goes.
This is the part:
I'm sure I did one of these on my old 405 years back.