Steel and Rubber Piece Under Seat

Who was looking to find some info on what the part under the seats? I remember a thread about this part and if i remember correctly no one knew what it was for. While roaming around ebay tonight I found this;

cgi.ebay.com/65-CUTLASS-442-HEATER-AIR-DIVERTER-BRACKET_W0QQitemZ310181617109QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item483843ddd5