After finding loads of holes in the pipes leading from the SLS pump to the control valve, I cut both lines and removed them, which they did quite easily as they broke into several pieces!

Now I am having trouble locating a source of metric brake line and fittings. The questions I have is

A) What size brake line should I be asking for?
B) Are the pipe nuts 10mm or 12mm (different parts guys give me different answers).

Unlike what some SLS drawings indicate, my controller did not come with a banjo bolt on the return line - both lines have a pipe nut with an ISO bubble end.

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1984 300TD