@4wd: Wow! Thanks for the link.
That's a
very interesting discussion there on the British Columbia Triumph Registry (Canada) website:
NOS Lucas Replacement Wiring Harness Smoke Kit- it of course includes references to the old TRs (Triumph Roadsters), which brought back some memories. As a long-time petrol-head I used to have a TR4 (2138cc) with a Surrey Top (was quite rare), with twin 1½" SU carbs that were always going off-tune - so I replaced them with 2 x twin-choke 45DCOE Webers instead. My local petrol station loved me!
But Lucas eh? I used to work as a systems analyst on the Works Engineering and Maintenance Planning System (ran on an IBM 360 at their datacentre) at the Lucas-CAV factory in Finchley (N.London, UK). I was a regular customer of the staff counter in the warehouse, where one could buy Lucas automobile electrical equipment at 50% discount (sometimes greater).
That's where I bought one of the superb Lucas 8-track tape stereo players (with under-seat speakers) for my car. I remember they also had these
NOS Lucas Replacement Wiring Harness Smoke Kits on the shelves, but not for sale to staff, and I would sometimes see them being taken off the shelf by the older Electrical Engineers (never the apprentices). I always used to wonder what that was about.