Are all three flexible brake hoses the same other than maybe length? Or are the threaded fittings different front-rear? Or are all of them exactly the same? If it makes any difference, I've got a 67.5 1600.
The reason I'm asking is that I'm replacing the rotted, nasty, totally useless mostly-rubber-covered pieces of shi...er....I mean..."ones" with stainless steel braided lines for non-DOT use and when I checked at a couple of local dealerships, they couldn't find the number, and both claimed they didn't even have a competition book for our babies.

The number on the competition parts page here didn't come up on the dealers' computers, so maybe the factory stuff is NLA. Or maybe they just don't want to look anything up. Who knows??
By the way, what thread are the ends, anyway?