2 Litre Saloon heater

[Norman]

Were any of these cars fitted with a heater from new? And if so, does any member own a car with an original installation?
I am buying a 2 Litre Saloon which has never had a heater, but as I live in Scotland I think I would be glad of one! I wouldn't want to fit anything which spoiled originality. so if I could get photos and specs. or maybe even take a look at the installation, that would be very helpful.