My Dads 1972 car (owned by him from new) had multiple drilled grill holes. When he went to pick it up it had no grille, for reasons long forgotten in the mists of time. The dispatch shop foreman drew one from stores and drilled the new holes whilst my Taid looked on!
Once he had finished with the grille, also touched in the screw heads on the front number plates and left a nice paint run down the number plate - carefully preserved during the cars rebuild!
Arwyn