urq brake line problem

[A. Gaidos]

All,
 I'm attempting to replace my proportioning valve on my '85 urq. Naturally
in trying to remove one of the brake line connection one is frozen in place.
Using both a standard 11mm and flare nut wrench to loosen it has only
resulted in the rounding of the connection.
 The vehicle has no brakes so I can't drive it to a shop. Wrenches are not
going to get it off and using some like vise grips will only make it worse.
Even if I can get it off with vise grips the fitting would be trashed.
 So A) how do I get this thing off and B) how do a replace the fitting once
out? Of course it isn't one of the short lines to the master cylinder that
could be easily replaced. I guess tomorrow I'll have to call Didi to see if
these brake lines are still avaliable.
 CRUD MONKEYS!
Anton