WALDEN — The Rev. Thomas Colucci is believed to be the first member of the FDNY to go on to become a priest for the Archdiocese of New York.Now he is settling in to his role as the new administrator for the Church of the Most Precious Blood in Walden.“I believe that the Lord has a plan for everybody’s life,” Colucci said.Still, Colucci, 63, could not have foreseen everything that lay ahead of him when he was serving as an altar boy at St.