I just did entire front-end replacement (ball joints, hub bearings, brakes and rotors) on my 2000 F350 and when I was turning the truck around to do the rear brakes and rotors, I noticed a significant fluid loss (refilled the resevoir twice). It turns out that the steel brake line is crusty with rust and spurting out brake fluid like a stuck pig. I went to my buddy at NAPA and he said to make sure that I bring the ends to match with the hose and flare tool I need. He said if you don't reuse the existing ends it could be a real pain to get the right fittings (he's had to create an adapter brake line). Just a word of advise to those who want to undertake this project. If the ends don't come off, make sure to open all of the bleeders, heat the ends and spray PB Blaster on the fittings to shrink them. Something I have to pursue soon since the first snow fall already hit us yesterday here in rural CT. I'll keep you all posted on my progress...wish me luck!