Doing the same job right now...if you are replacing the front-to-rear body line, be sure to have extra hands to help, and the car far enough in the air that you can comfortably move underneath it and move your arms 90 degrees from the ground, and rotate the tube without smacking the ground.

Regular steel brake lines are a whole lot easier to work with and more forgiving than stainless when trying to do this job with the car fully assembled.

I haven't gotten to the fronts yet, but the left looks pretty easy. I haven't looked at the right yet.