Ahead of a showdown in Albany Friday over the fate of the Moynihan Station project, Speaker Sheldon Silver said he would vote against the proposed train station because it would benefit only riders from New Jersey.

Using his seat on the Public Authorities Control Board, Mr. Silver has twice blocked final approval of the $900 million plan to remake the Farley Post Office building on Eighth Avenue between 31st and 33rd streets into a transit hub to accommodate some passengers from Penn Station across the street.Yesterday, he said in a statement he would not support the plan because it would benefit only “non-New Yorkers.”

New Jersey Transit would be the anchor tenant in the proposed station. Amtrak backed out of an earlier agreement. State officials said the station would also provide access to both the Amtrak and Long Island Rail Road platforms and alleviate the overall congestion of Penn Station by as much as 30%.

Yesterday, Mr. Silver endorsed a plan that has been outlined by developers Vornado Realty Trust and the Related Companies to move Madison Square Garden into the back of the Farley Building and to renovate Penn Station.

“We need to move ahead with phase two in order to ensure that Long Island Rail Road, Metro-North, Amtrak and subway riders are all afforded an updated, safe and modern transportation facility,” Mr. Silver said.

Governor Pataki, at a press conference yesterday intended to drum up support for his plan, said delays are costing between $5 million and $10 million a month. He said the state would lose the opportunity to buy the post office building from the federal government if the project is not approved by the end of the year.

The state’s leading development official, Charles Gargano, called the delays “politics at its worst.”

He said a plan to relocate Madison Square Garden “is merely an idea which is years, years away.”