I just pulled this from my notes. I believe this is as accurate as possible;
Ally parts - unfinished. Including the cast ally bell housing forward cover piece. Mays heads always unpainted.
All pressed steel parts - black. The engine pictured appears to have crackle finish paint, which I doubt Ford would have used in production.
Block - green colour as shown and discussed. I presume an original iron head would also be this colour.
Crank pulley, water pump and thermostat take off - I'm unsure but black would of course work.
There's a fairly active forum, for which you'll need a log on;
https://ukmk3zephyrzodiac.proboards.com/James Eastwood