Putting in a new Master cylinder. I noticed the brake lines bolt that goes into the Master cylinder is a little rough. It did not ever leak there (from what I know of). Anyways, I looked at the bolt and the threads do not go all the way to the end. There is a little flat section and then what looks like a few little threads at the very end where it connects the seal. Should it look like this? If I need a new one, can I just buy the 2' 6" hard brake line at an auto parts store? Also, I have a 4" lift and was inspecting the rear line and feel that there is not any danger of being too tight at all. I know I have read a lot that people have to replace these for full flex and all, what’s the story? Thanks guys, I can’t tell you how helpful this site is to my money-pit and myself.