Checking rollers and tightening loose hinge bolts is reasonable homeowner work, and lubricating track and hinges with a garage-door-specific spray a couple times a year is worth doing on any door this age. What you shouldn't touch is the spring itself - extension or torsion, it doesn't matter, the stored tension in either one can cause real injury if it releases while you're working on it. On a 1963-built door, the other thing we'd flag is the cable at the bottom bracket: if it's frayed, the door can drop suddenly when you lift it, and that's not a wait-and-see repair. If the door feels heavier than it should, or makes a grinding noise on one side only, that's usually a track or roller issue rather than a spring issue - worth a look before assuming the worst.