Rear brake size

Thanks to all the replies and advice. Darter6, that makes more sense now. I've heard some people say that these rear brakes are a really good set up on an A body.


Got my shoes and a wheel cylinder. Couldn't get the brake line that goes in the wheel cylinder off. Does anyone know what size the nut is? 10mm is too big, 9mm too small. 3/8" too small, 7/16" too big. The 10mm fits on, but when I go to loosen it, it starts rounding the fitting. There's no other sizes between those, unless you go to 32nds, which it would be 13/32" I think but you can't find a wrench that size.