In one scenario, Manteca High School would be two stories with a rebuilt tower, regulation athletic facilities, a cafeteria capable of serving as a rain shelter and better overall security for students. And it would all sit on one campus – not separated by Garfield Avenue like it is today.Whether those dreams can be realized on a budget of just over $32 million in modernization funds approved by voters, however, remains to be seen. On Tuesday a coalition of students, staff, parents and alumni and the greater business community brainstormed their ideas on what they would like to see included in Manteca Unified’s overall plan to renovate and modernize the district’s oldest high school – regarded by many to be the “flagship” campus of a district that serves 25,000 students.