I will definitely be replacing the steel brake lines before too long, probably with stainless steel. I just bought the truck, and thought it would be wise to go through the brakes before driving it much. At this point, I've replaced all the brake parts other than the master cylinder and steel brake lines. This thing still had the original brake drums, with the fronts riveted to the hubs. What I thought would be a weekend brake job turned out to be a bigger project than I thought. I guess that's normal for an old truck restoration! :-)