Ahh, OK, thanks for that. Beechey ran his 1970 ATCC winning HT (the one in the Bowden collection) at the New Zealand Grand Prix meeting at Puekkohe in January 1971, as a special guest. This must have been the set-up he ran on the car in 1971 (and maybe 1972 as well). The Bowdens restored the car to its 1970 ATCC winning guise, hence the quad-Webers.