After being in contact with several members of the L.A./Orange County Dodge dealers and hearing about their regional meetings I find it possible that even if Chrysler announced the Dart Charger 273 to be sold in southern California only that when they had their regional meetings someone got hold of and heard of the DC 273 and wanted to order one. I find it strange too that "sold in southern California only". A bunch of them were sold in San Fransisco too. That might be northern California to even if I'm not sure where the north, central or the south border in California is! I live in Sweden! :)
