Jordan,
In my opinion your lines will ultimately need replaced anyway as they are old and prob full of corrosion, for safety sake I would not try and save that old hard brake line for all the more new lines will cost.
Take a hack saw or saws all cut the lines near the fitting and then go after the fittings after a good soak in PB ...you shouldnt have much trouble getting the fitings out.
There are a few things on your project that are probably best to to just sacrifice, OLD brake lines is one that is on the top of the list.
You are prob having trouble as the Old lines are frozen fast to the fitting wich is indeed holding up your removal.
It is your call on this one, But in my expeirience tryin to save old lines just isnt worth the aggrevation.
Just my 2 pennies.
Tim



1952 Chevy Shortbed

Photos in Photobucket

If It Aint Broke Fix It Till It Is!