to replace it properly, if they are bending and running new, it sounds possible considering it requires removing the old rusted out one and probly bending one out of replacement lengths and then flaring ends if they do it the proper way. i wouldnt wna replace a full steel line myself on a hydraulic braking system. one my regular systems with brake boosters ive cut, replaced in sections with compression unions and called it a day because they were daily drivers and if they fail, its my fault.