I've been replacing the old brake hoses on our Cordoba and hit a snag. The fronts went fine but in the back I had some trouble. I was able to break the line loose from the hose but the tubing is seized inside the fitting. I've been soaking it in PB Blaster for the last couple days but still no luck. Of course I don't want to twist the line off so I was wondering if there is another way to break things free. I tried just threading the new hose on to the fitting but it's keyed and naturally the key is about 180* from where it needs to be and I don't want to twist the line that much. I only have a propane torch to heat it but I really don't want to use heat. Is there another magic potion I could use to spray on it to break the rust loose or is heat the only option? Hope you guys in the rust belt would have a good solution since you probably deal with this a lot. Here's a pic of the trouble spot.