Left Bucket Seat Extenders, 2 piece set. These Move the Driver's Seat Back About 2" for More Leg Room. This was Available as a Dealer Accessory Part.
Chevelle 1966
Chevelle 1967
Chevelle 1968
Chevelle 1969
Chevelle 1970
Chevelle 1971
Chevelle 1972
El Camino 1966
El Camino 1967
El Camino 1968
El Camino 1969
El Camino 1970
El Camino 1971
El Camino 1972
Reference: bucket seat brackets, seat brackets, floor pans, bucket seat tracks, bucket seats