Drums to disk swap, small to big rotors ?'s

The 73 up v8 k member will have spool type mounts vs the biscuit mount of the previous years.

I have heard that there is a small geometry difference when you swap the spindles and I have also heard that there is not and that they ar symetrical. If you don't plan to install a sway bar or you are going to use the 73 up style that mounts further inboard on the lower control arm I would mount the calipers to the front just to be safe on the geometry thing. There is no performance advantage to either location as far as braking goes.