Edit - yep the Craptera used the narrow angle V6.
No, the Carlton was a Euro only model - a cut price Opel Senator with 4cyl engine instead of the 6cyl (except for the Lotus one), mainly sold as company cars as perks for upper-middle managers. Nice old cars, reliable and the estates (Station Wagons) were huge and useful but they rusted surprisingly quickly so very few survive.
Still can't find a European GM with the 3800 though.
EDIT - Only one I can find
http://en.wikipedia.org/wiki/Pontiac...uropean_market