The new owners of 401 North Broad St. (former North American Publishing and Packard Motor building, also where Philadelphia’s Vietnam War draftees reported, and Civil Affairs cop George Fencl based his surveillance of antiwar demonstrators) will invest $70 million in upgrading the 11-story, 1.3 milllion sq ft, block-long pale-brick Internet and data carrier hotel, says Gerald Marshall, chief executive at New York-based Amerimar Enterprises.