Like the title says...these are the mounts for the front bumper.
These are from/for a '76
but may work for older models as well, I don't have access to older part numbers as the moment to confirm this. ((( EDIT: Checked my parts manual and these brackets are for '76 ONLY...sorry for the delay/confusion)))
Stamped with GM Part # 489512 RH and 489513 LH
Good condition (and not bent) ...install as-is or media blast and paint for a restoration.
$40. plus actual shipping costs via USPS from 47630Reference pic
Pic of actual parts: