OK, so one needs to use 7/16 tapered wheel nuts. But the hole in the rim only suites a thin wall 19 mm socket, a standard wheel nut cross bar will not fit. so one must use a 7/16 tapered wheel nut with a 19 mm long socket head and a breaker bar freaking heck........... So I have ordered 7/16 wheel nuts with a 19 mm socket head. Bloody old cars and new rims, but they do look so nice on the car.
Scott