While the fender will fit '70-'77 there were several Part number changes on this fender during the years that it was in production. The changes range fron the early varient with an extention for the washer bottle, to- no extention, and additional holes here and there. It will fit and look correct on the exterior, but the structural changes visible were made on the interior of the fender as viewed from the engine compartment. Can you tell us what year the fender was purchaced from GM?? That will help narrow down which version it is.
Phil
