hello, received a couple of nos parts and were told corvair! i know what a pair are but what year ? rear engine grills gm part #1-3863579 mdlg gr.1.267 , also a long trim pc. below taillights? curved a endsa,,m gm. part # 1#3870742 gr. 12.182 mdlg eh9 , possibly full size chevy? any help would be appreciated thanks brad