Posh head to the Matchroom Stadium on Tuesday night for the second leg of the Sky Bet League One play-offs (7.45pm).
Peterborough United and Leyton Orient go into the second leg of the play-offs all-square at 1-1 following the first leg at London Road on Saturday afternoon.
The second leg at the Matchroom Stadium kicks off at 7.45pm and is live on Sky Sports. Posh have sold out their allocation of around 1,400 for the fixture.
Ferguson said: 'I have a fully fit squad to choose from and I certainly won't be making many changes and I wouldn't expect Orient would make many if any either. The game is evenly poised at 1-1 and we are looking forward to the game.
'I have watched the game back from the first leg and although Orient had a few chances in front of goal, I don't think they dominated the game and if Britt Assombalonga takes the chance at 1-0, you never know how things would have ended up.
'We won at the Matchroom Stadium earlier in the season and played well that day and we can take heart from that performance. We tend to do well in one-off games and this is a one-off game,' Ferguson said.
Leyton Orient may be unchanged for the second leg. Scott Cuthbert returned for the first game, a 1-1 draw, which saw utility man Elliot Omozusi replace natural left-back Gary Sawyer in the starting XI.
Posh have won six of their last 10 games in all competitions, drawing two and losing two and have won two of their last five away games, losing the other three.
The game will be played to a finish with extra-time and penalties if required. Away goals do not count in play-off ties.