Rite Folks
I think, to use a technical expression, I have been talking B011ixs! - at least a bit mis-leading....
The head is not steel - it is Aluminium!
The Electronic Ignition Unit is an MSD 6AL.
The distributor is an Accel 43001A which is, i believe, a magnetic impulse type.
There are 14/15 threads in each plughole.
The Plugs are NGK BP6ES type. The data, for which is....
14mm Thread, 19mm (3/4") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Non-Resistor, Removable Terminal, JIS Height, Projected Tip, .032" (0.8mm) Gap, Heat Range 6. Interestingly no Ford is mentioned on the NGK site as a recommended user.
There is very little distributor gear debris (I could only see one small shard) in the distributor access hole.
The HV Oil pump is pn SPR22441128.
The coil is an MSD Blaster2 Red coil.