Pick any player season you want. (example: 91-92 Manute Bol)
The next player you pick must have been on the 91-92 76ers. (so lets say Charles Barkley)
You then pick any season you want of that player. (we'll go with 87-88 Barkley)
Now the next teammate must come from the 87-88 76ers. You continue this until you have all 12 players.
-52 mil cap
-You may only use 1 of the following players: Wilt, LeBron, MJ, Rodman, and Kareem
Basketball-Reference.com is your friend...I'd use it for this league.