I am wanting to run an all MSD ignition setup and Summit lists two different MSD distributors.
It will be installed on a 70 Charger with 512RB and 4speed.
I am running a Hughes Cam.

MSD standard -which is designed to use with a MSD 6,7 or 8 series ignition box....but it doesnt show a vacuum cannister on it.

And

MSD ready to run- which supposedly can operate without a separate ignition box....and does have a vacuum canister on it.

Which would be the better distributor to use?
Will I need to replace anything else in order to run either of these distributors?