Christo,
Lovely photos, I look forward to seeing the car in person (again) some time.
While we're on the subject of Aurelia steering wheels, can I ask you if you know of somewhere I could buy a horn button like the one on your lovely flat Nardi?
Rough running. I've just (after a trail of false leads that included a recored radiator, new electric fuel pump, new ignition leads...) managed to sort the bad behaviour of my S6 B20, which when hot, would start to run rough, then refuse to restart until it had cooled down. I swapped a spare distributor in at the weekend and Bingo! the problem has gone. I'm pretty sure that the internal wire that Chris referred to was at fault - the insulation strip between it and the body of the distributor increasingly acting as a conductor as things warmed up.