CKE Restaurants Holdings has unveiled plans for a major update of sibling chains Carl's Jr. and Hardee's, a project that will include revamping restaurant exteriors, simplifying menus, adding new kitchen equipment and implementing digital drive-thru menu boards. The chain will invest $60 million in making changes to company-owned locations, and franchisees are expected to collectively spend $440 million over the next four to six years. Nation's Restaurant News