A Macomb Township woman UAW big wig admitted Monday to conspiring with others in the UAW and FCA to receive illegal payments for personal expenditures, federal authorities said.Nancy A. Johnson, 57, the second highest former official with UAW-Fiat Chrysler, pleaded guilty in U.S. District Court in Detroit to conspiracy related to receiving illicit monies that she used for luxuries including trips to a California resort, lavish parties and meals, and purchase of expensive items.