The common practice of replacing the original differential with a newer high speed assembly usually brings up another question: How do I connect the late model brake cable to the original brake system?
As the ends of most GM cables terminate with a steel ball, they can easily attach to a brake line connector as used on later GM vehicles. See photo. The other end of this connector attaches to a threaded 1/4″ hook found at your local hardware store. A nut on the brake’s shaft can be adjusted to eliminate excess looseness in the cable when the brake is not being used. This easy attachment will give years of dependable service!