We at Driven Concepts do stitch welding. Attached are some pictures of our work. As people have mentioned, it's not an easy job, there's a lot involved, the actual welding isn't hard, but paint removal etc, are what takes an extended amount of time. This would be a great project to take on when and if the motor's out. While the motor's out, you can get the welding completed and also paint the engine bay at the same time.