A responsible ferry pilot may have a higher gross weight in some circumstances, but will have a C of G where it should be. It will probably be aft, as ferry tank will be burned during the flight to move the C of G back toward forward, but I very much doubt they would fly out of limits approved by the authority for that flight.
Some aircraft, including many 172's. are permitted to fly at 130% of their gross weight for ferry, with specified restrictions. When doing so, pilots tend to use lots more runway voluntarily.