This is the bracket and insulator for one side on the 68-72 GM A bodies.. (Most).. inc GTO / LeMans with the side radiator tank.
Use two for one cars set up.
Image is correct.. Two used per vehicle at the lower side of the radiator support.... holds the radiator steady at the lower end.
.jpg "Trunk Floor: 55-57 Chev Pan w/out braces *")
.jpg "Fuel tank Sender Unit: 68-74 Corvette")