If this really is from 1973, it would be late 1973. That Chrysler Town & Country is a 1974 model or newer. https://www.hemmings.com/blog/2018/06/28/detroit-1973-2/?refer=news
It looks like it could easily be Oct-Nov time frame, odd to see the Trolley tracks were still in place 15 years after they stopped running, the shot looks to be looking west just east of Woodward Ave.