Ayers Saint Gross, a Baltimore-based architecture and planning firm, has been hired to recommend ways to redevelop the former Chrysler automobile assembly plant in Newark, Del. The University of Delaware acquired the 272-acre property and plans to replace it with a high-tech campus for research, business and academics as an extension of its main campus in Newark. The university has asked Ayers Saint Gross to develop a vision for the Chrysler site and how it could fit with the rest of the university's real estate holdings.