'69 Camaro spindles.

[big gear head]

I'm taking the original disc brakes off of my '69 Camaro and installing Aerospace brakes. I want to keep all of the original disc brake parts together. What I need to know is are the drum and disc brake spindles the same? I'm going to have the spindles off so that I can replace the bushings and ball joints in the control arms, so this would be the time to change the spindles. Also, are the steering arms the same?