Yup, just get the Dr. Diff bearing sleeves. Don't even worry about the dust shields, they're useless. The bearing sleeves basically convert the the 70-72 E-body spindles to accept any of the 73+ rotors and bearings. You can actually keep your stock calipers if you just stick with the stock sized rotors.
If you're actually looking to upgrade brakes and not just get rid of the early rotors, with a set of bearing sleeves you can run the later 11.75" mopar rotors. Dr diff has a kit for that,
http://www.doctordiff.com/front-disc-brake-kit-for-11.75-on-disc-knuckles.html. If you go through the kit options you can "delete" the spindles, which knocks the price down. The kit includes everything you need otherwise except for the bearing sleeves.
Or, you can see if you can find a set of pin type caliper brackets for the 11.75" rotors, which would let you keep your calipers too. There's a seller on eBay that makes them, but they're expensive. Usually, they're only $100-$150 for the used versions if you can find them. Here's that link
http://www.ebay.com/itm/MOPAR-LARGE-ROTOR-11-75-PIN-CALIPER-BRACKETS-NEW-FROM-TRM-/221451385286?pt=Vintage_Car_Truck_Parts_Accessories&hash=item338f87f9c6&vxp=mtrI managed to find a set of 11.75" pin style caliper brackets for my Challenger, and run the 11.75" rotors with my stock calipers. They work great. You do need 15" rims to do it, but with my 17's its really not an issue. They stop the car MUCH faster.
If you're running bigger than 15" rims Dr Diff has other brake kits that will work too. I have his 13" rotor kit with cobra calipers on my Duster, but those need at least 17" rims. Those work spectacularly, and compared to other large rotor kits they're priced pretty reasonable.
