Rear Disk Brakes

I'm sure this has been answered before, but I can't seem to find it. My 73 Duster /6 had drums front and back. I have put disks from a 74 Dart Sport on the front and a Strange 60 with disks on the rear. What kind of m/c and other things do I need to get this thing going?

Thanks in advance for your help!!
Dustaar