Wheel bearing for 7-1/4 rear end?

I have a 64 Dart GT with 7-1/4 rear end, and I need to replace the noisy bearings. They are currently green bearings, but I would like to use the original tapered bearing setup. A couple of questions: 1) Can I convert directly back to tapered, or are changes made when converting to green bearings that complicate going back to tapered? 2) Can anyone tell me the tapered bearing part number for this rear end?