The South Korea midfielder believes the squad is much stronger now than at any other point in the past two years.
The arrival of players like Carlos Tevez, Owen Hargreaves, Anderson and Nani has given Park cause for optimism going into a crucial part of the campaign.
Leaders United return to league action tonight against Portsmouth at Old Trafford after defeating Tottenham to set up a match with Arsenal in the fifth round of the FA Cup.
Next month there is the small matter of a two-legged meeting against Lyon in the Champions League, and Park is excited about the challenges that lie ahead after recovering from a serious knee injury.
He said: "The team is better than last season and the year before.
"We are all getting better and that means we have a good opportunity to win all competitions.
"Last season we had a chance to win many things but had to settle for the league title.
"That is good but it could have been more. This season we have a good squad with injured players coming back, so we are better equipped."
Problems
Park made his comeback on Boxing Day against Sunderland and insists his injury problems are a thing of the past.
He said: "My knee is fine. Since I have been back playing I have had no reaction, so I feel good.
"Physically I am in good condition because I have been in the gym for a long time."
Park is hoping to face Portsmouth but centre-half Nemanja Vidic remains doubtful after being forced to miss the Tottenham game because of a virus.
Paul Scholes is pushing for a place in the starting line-up following a 25-minute appearance in the fourth-round tie, three months after a knee operation.
Meanwhile Danny Wellbeck, 17, is joining the first-team squad as manager Sir Alex Ferguson has been pleased with the striker's progress.
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IT will be good to have Park around when he is fully fit.
Has tremendous stamina and could prove to be an important player come the end of the season.
Another article about a treble!! This is doing my left nut in!
Mancunian, I feel the same way as you about all this treble talk. That makes us a pair of nuts!!!
For me Park will never be more than a squad player.