A little more news, and a few questions to the collective...
I visited the 'guru' who will be putting the various parts together to make them work, yesterday, and he had a good chance to look over the bike, ask questions and make some suggestions and such. It looks like the existing ignition arrangement might not be required at all, with the possibility of fitting a timing ring onto the LH flywheel with a trigger mounted neatly in the timing inspection cover.
I'll also need to source a suitable throttle body, or perhaps modify (remake?) the inlet manifold - getting the injector as close as possible to the combustion chamber is the goal.
Questions... I won't need a fuel tap as such as the fuel will just feed directly to a pump and regulator - the rubber pipe feeding the tap (for the Prime position?) is an uninterpreted feed that I could use for this purpose, yes? Does the LH flywheel (with the timing marks on it) run dry or wet, i.e. is that 'chamber' it's in part of the sump or is it exclusive from that? How easy is it to get to the LH flywheel - how difficult is it to remove the alternator? I remember someone on the forum mounting an oxygen sensor into the exhaust splitter/manifold - are there pics floating around of this?
Progress will be a little slow, but I'm off the starting blocks now.
I'll drop the bike off in the next couple of weeks or so once I gather a few bits and my guru has time in between his other stuff to get stuck in.
The rubber pipe feeding the tap ( petcock / fuel valve ) is a vent with a metal tube inside the tank that extends to the top just behind the filler cap. You can see it with a mirror. The left flywheel is in the sump and wet. Flywheel and Alt. rotor are easily removed with the right pullers. Both the Alt. coils are mounted to the inside of the cover and come off with the cover.