TimB, I am guessing you have found access to the UK vehicle wiring colour codes given you are quoting BS identification numbers.. As for the wiring diagram in Morgan handbooks supplied with the car, well it seems they are to be considered as no more than a rough guide and not an "as fitted" instruction set, certainly not in the case of my mid 80`s +8.
Perhaps for the CVH, it might be worth searching Ford web sites for wiring diagrams relative to the engine requirements of wiring systems, as I doubt that Morgan might alter that too much, if at all..?
Between MMC manufacturing tolerances and modifications perhaps carried out by previous owners, in General I suspect Morgan wiring can be a bit challenging to try to understand, though if you have a particular issue, I suspect you will find folk here keen to help.
Good luck.
