76 Aspen Disc brakes

For a drum to disc brake swap They will fit all 1962 -1976 A when using big ball joint upper arms, and 73-76 disc brake lower ball joints.

And also fit 66-72 B body
And 70-72 E body

Both of those have the K772 BBJ upper arm. Not sure which lower ball joint those need.

Also an FYI, the 63-76 A body with SBP 4 wheel drum brakes, yes these animals do exist. If they are a 10" finned front drum setup on 73-76 A body, the upper arms are the BBJ arms. I grabbed 2 sets this way out of the wrecking yard because everybody else passed on em thinking they were small ball joint arms.

Hope this helps
Matt