Herc is still noted as C130 on the flight plan, whether civvy or mil. It's a generic term before you get your panties in a knot.
No amount of TLC will remove the wrinkles from the ramp hinge bulkheads of the old TransAfrik birds. As for new wings, that must have cost a fortune. Was it worth doing that to knackered old airframes with the bean counters of Imperial looking over their shoulder?