Most garages in Westville were built around 1954, which means a lot of them still carry the door that came with the house: a narrow single-car opening, sometimes a steel panel door, sometimes older wood, hung on whatever spring setup the builder used at the time. That's either a torsion spring wound on a shaft over the header, or an older extension spring pair running along the horizontal tracks. Both store enough force to break a hand or worse if the winding bars slip.
On a torsion setup you need bars cut to the right length for the cone, a way to hold the door steady while the spring is under tension, and a clear read on how many turns the old spring had - guesswork here either leaves the door too light to lift or snaps the new spring on the first cycle. Extension springs are less violent to wind but just as dangerous if the safety cable is missing, which it often is on doors this age.
We're not going to tell you it can't be done. We're telling you that on a door built in the Eisenhower years, the margin for error is smaller than on newer stock, because the hardware wasn't made to today's spec and there's no manual in the garage to check against. If you want the general rundown on how the job works before you decide, that's covered on our [main spring repair page](/garage-door-spring-repair-danville-il).