A broken torsion spring on a double door is not a bolt-it-back-together job, and that goes double on houses this old. Valley Center's housing stock centers on 1983, which means a lot of these doors are still running on the spring that came with the house. A spring that's been wound and released for over forty years doesn't fail clean - the coil can be fatigued unevenly, and winding cones on original hardware sometimes corrode or strip before you ever get the bar in place. If you've got the winding bars, the clamps, and you've done this before, fine. If this is your first time standing under a door with a spring under 150+ pounds of torque, that's the honest line we'd draw: this is a wrench-the-torque-correctly job, not a YouTube-and-hope job. We'd rather talk you out of it than patch you up after.