I crunched those number a few years ago using data from 3 registries. My count was 28 confirmed 2 H/L cars. VINS ranging from 904 to 1142.
I have examined 5 2 H/L cars and all had cable operated headlamps.
I do not know why anyone would convert a car from 4 to 2 as historically they have brought less money. There are at least 4 confirmed cars converted from 2 to 4.
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