Manteca High after the dawn of its second century could become a linchpin of a joint city-school district effort to get maximum education and community amenities using limited tax dollars.Manteca Unified and City of Manteca elected leaders and top management are batting around conceptual ideas to transform the 97-year-old campus so that it can be a 21st century school while returning to its roots as a community center. In the latest 2x2 meeting — so called as it involves two elected leaders from each agency — ideas were floated regarding where Manteca High is headed as the district gears up to spend $15 million on the campus in its second wave of Measure G modernization projects. While not a cent of bond money will go toward accommodating growth, how it is spent to address infrastructure for a variety of health and safety issues will create a footprint to allow for the adding of new classrooms and new support facilities.“Everything is on the table,” Manteca Mayor Steve DeBrum said.