Like he said, take and cut the tab that holds the brake line off of the tower where it bends outwards. After you have removed the ifs towers, reweld that piece of retainer back onto the frame. There appears to be a fair amount of slack in the metal line so carefully bend and manuver it until its out of the way, then weld it back on. On solid axle trucks this retainer was vertical on top of the frame. When lifting their trucks, most guys would cut that tab off and reweld it to the side of the frame so extended brake lines wouldn't be needed. Its almost the same thing here.