CanadianGuy
<font color=green><br><br><font color=blue>Me and
- Joined
- Apr 24, 2006
- Messages
- 15,505
i dont know if they are, i think preferred rooms are just rooms closer to the main building (less walking) - honestly, just call disney and ask them to make note that you'd prefer to stay in the 70s building. i think the mickey phone building might be building 2 (can anyone correct me on this?) - but you could call and say you'd really like to stay in that room, they'll note the request and likely arrange it when you check in.
Areas of the 70's rooms are considered to be preferred.
This map (sorry for the size) shows you the areas where those rooms are located.

Image courtesy of DIS'er and Map Guru - WillCad